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NCERT Exemplar Class 11 Physics Solutions Chapter 9 Mechanical Properties of Solids

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NCERT Exemplar Class 11 Physics Solutions Chapter 9 Mechanical Properties of Solids

Edited By Safeer PP | Updated on Aug 08, 2022 05:09 PM IST

The chapter revolves around all the mechanical properties of the solid particles. NCERT Exemplar Class 11 Physics solutions chapter 9, explains in brief about all the mechanical properties any solid would contain. Elasticity is the qualitative measure to stretch an object, and plasticity is termed as the property of a solid to regain its original shape. A team of experts makes NCERT Exemplar Class 11 Physics solutions chapter 9 that helps the students gain knowledge by easy explanation and concept clearance. If any student wants to prepare for competitive exams such as JEE Main or NEET, the NCERT Exemplar Class 11 Physics solutions chapter 9, will help the student perform very well in the examinations.

NCERT Exemplar Class 11 Physics Solutions Chapter 9: MCQ I

Question:9.1

Modulus of rigidity of ideal liquid is
a) infinity
b) zero
c) unity
d) some finite small non-zero constant value

Answer:

The answer is the option (b) zero.

Question:9.2

The maximum load a wire can withstand without breaking when its length is reduced to half of its original length, will
a) be doubled
b) be half
c) be four times
d) remain same

Answer:

The answer is the option (d) remains same.
Stress = force/area
The breaking stress is not dependent on the length, and hence if the cross-sectional area is changed, it will not affect the breaking force.

Question:9.3

The temperature of a wire is doubled. The Young’s modulus of elasticity
a) will also double
b) will become four times
c) will remain same
d) will decrease

Answer:

The answer is the option (d) will decrease.
Y \alpha \frac{1}{\Delta T}
So as the young’s modulus increases, elasticity decreases.

Question:9.4

A spring is stretched by applying a load to its free end. The strain produced in the spring is
a) volumetric
b) shear
c) longitudinal and shear
d) longitudinal

Answer:

The answer is the option (c) longitudinal and shear
The strain produced is shearing and longitudinal in this case as the spring when stretched by a load, the shape and length changes.

Question:9.7

A rectangular frame is to be suspended symmetrically by two strings of equal length on two supports. It can be done in one of the following three ways:
23
The tension in the strings will be
a) the same in all cases
b) least in a)
c) least in b)
d) least in c)

Answer:

The answer is the option (c) least in b)
eer3e2
Let us have a look at the free body diagram for the scenario.
The net forces will amount to zero.
Vertical components
2T sin \theta - mg =0
T =\frac{mg}{2\sin \theta }
T \propto \frac{1}{\sin \theta}

Hence tension in all the cases is different.
And, option c is the correct choice.

Question:9.8

Consider two cylindrical rods of identical dimensions, one of rubber and the other of steel. Both the rods are fixed rigidly at one end to the roof. A mass M is attached to each of the free ends at the centre of the rods.
a) both the rods will elongate but there shall be no perceptible change in shape
b) the steel rod will elongate and change shape but the rubber rod will only elongate
c) the steel rod will elongate without any perceptible change in shape, but the rubber rod will elongate and the shape of the bottom edge will change to an ellipse
d) the steel rod will elongate, without any perceptible change in shape, but the rubber rod will elongate with the shape of the bottom edge tapered to a tip at the centre

Answer:

The answer is the option (d) the steel rod will elongate, without any perceptible change in shape, but the rubber rod will elongate with the shape of the bottom edge tapered to a tip at the centre.
M is the mass which is being positioned at the mid of the rods made of rubber and steel
Y steel > Y rubber
Hence, \frac{\Delta L}{L} (rubber) will be larger for the same \frac{F}{A}. in the case of steel \Delta L is insignificant. But, in rubber \Delta L is significant as the shape changes and hence d is the correct option.

NCERT Exemplar Class 11 Physics Solutions Chapter 9: MCQ II

Question:9.9

The stress-strain graphs for two materials are shown in Figure (assume same scale).
24

(a) Material (ii) is more elastic than material (i) and hence material (ii) is more brittle.
(b) Material (i) and (ii) have the same elasticity and the same brittleness.
(c) Material (ii) is elastic over a larger region of strain as compared to (i).
(d) Material (ii) is more brittle than material (i).

Answer:

The answer is the option (c) and (d)
If we compare the tensile strength, (ii) > (i)
So (ii) is more elastic as compared to (i) and hence option c is correct.
The fracture point for the material (ii) is closer than that of material (i). hence (ii) is more brittle than (i) and hence, option d is correct.

Question:9.10

A wire is suspended from the ceiling and stretched under the action of a weight F suspended from its other end. The force exerted by the ceiling on it is equal and opposite to the weight.
a) tensile stress at any cross-section A of the wire is \frac{F}{A}
b) tensile stress at any cross-section is zero
c) tensile stress at any cross-section A of the wire is2\frac{F}{A}
d) tension at any cross-section A of the wire is F

Answer:

The answer is the option (a) and (d)
We know that stress = \frac{F}{A} and hence option a is correct
Force balances the tension, which means T=F and hence option d is correct.

Question:9.11

Rod of length l and negligible mass is suspended at its two ends by two wires of steel (wire A) and aluminium (wire B) of equal lengths. The cross-sectional areas of wires A and B are 1.0 mm2 and 2.0 mm2 respectively.
25

a) mass m should be suspended close to wire A to have equal stresses in both the wires
b) mass m should be suspended close to B to have equal stresses in both the wires
c) mass m should be suspended at the middle of the wires to have equal stresses in both the wires
d) mass m should be suspended close to wire A to have equal strain in both wires

Answer:

The answer is the option (b) and (d)

T_b x = T_a (l-x)
\frac{T_{b}}{T_{a}} = (\frac{l}{x}-1) ------------------(1)
For wire A, stress
=\frac{T_{a}}{T_{b}}
For wire B, stress
\frac{T_{b}}{A_{b}}=\frac{T_{b}}{2A_{a}}
Since stress on steel = stress on Al
\frac{T_{a}}{A_{a}}=\frac{T_{b}}{2A_{a}}\rightarrow T_{a}=\frac{T_{b}}{2}
\frac{T_{b}}{T_{a}}=2
\frac{l}{x}-1 = \frac{2}{1}
x = \frac{l}{3} from point b
so, distance from A = l-x = l-\frac{l}{3} = \frac{2l}{3}
hence m is closer to B than A. so, option b is correct.
the rod remains in a horizontal and balanced. so, the strain will also be equal.
Strain (A) = Strain (B)
\frac{S_{a}}{Y_{a}} =\frac{S_{b}}{Y_{b}}
Y steel / Y Al =(\frac{T_a}{T_{b}}) (\frac{A_{b}}{A_{a}}) = (\frac{x}{l}-x) (\frac{2Aa}{Aa})
\frac{200\times10^{9}}{70\times10^{9}}=\frac{2x}{l-x}
14 x = 20l - 20x
34x = 20l
x = \frac{20l}{34} = \frac{10l}{17}
(l-x) = \frac{7}{17}
So, for an equal amount of strain, mass m will be closer to A
Hence option d is correct.

Question:9.12

For an ideal liquid
a) the bulk modulus is infinite
b) the bulk modulus is zero
c) the shear modulus is infinite
d) the shear modulus is zero

Answer:

The answer is the option (a) and (d).
A property of an ideal liquid is that it is not compressible. (K)Bulk modulus = \frac{-p(V)}{\Delta V}
\Delta V = 0 and K = infinite for an ideal liquid.
No tangential forces act on this liquid, the shearing strain Δθ =0 and F =0
n = \frac{\frac{F}{A}}{\Delta \theta} = \frac{0}{0} = indeterminate
hence a and d are true.

Question:9.13

A copper and a steel wire of the same diameter are connected end to end. A deforming force F is applied to this composite wire which causes a total elongation of 1 cm. The two wires will have
a) the same stress
b) different stress
c) the same strain
d) different strain

Answer:

The answer is the option (a) and (d).
As we know stress =
\frac{F}{A}
The areas of cross-sections of both wires are the same, and the force with which they get stretched is also the same. Hence the total stress for both is the same. Hence option a.
Strain = Stress/Y
As stresses are same on both,
Strain \propto \frac{1}{Y} (steel) and Strain \propto \frac{1}{Y} (Al)
Strain (steel)/ Strain (Al) = Y (Al) / Y(steel)
Now, Y(Al) < Y (Steel). Hence, strain(steel) < Strain (Al)
Hence, option d is correct.

NCERT Exemplar Class 11 Physics Solutions Chapter 9: Very Short Answer

Question:9.14

The Young’s modulus for steel is more than that for rubber. For the same longitudinal strain, which one will have greater tensile stress?

Answer:

Y = stress/strain and Y \propto stress
Y (steel)/ Y(rubber) = Stress(steel)/Stress(rubber)
We know that Y steel > Y rubber
Y steel/Y rubber > 1
Hence, stress (steel)/stress (rubber) > 1
So, stress (steel) > stress (rubber)

Question:9.15

Is stress a vector quantity?

Answer:

Stress = force/area
The directions of restoring and deforming forces are equal and opposite and hence there is no net direction of force. So, stress is not a vector quantity.

Question:9.16

Identical springs of steel and copper are equally stretched. On which, more work will have to be to done?

Answer:

\frac{\Delta L_{1}}{\Delta L_{2}} =\frac{Ycu}{Ys}
Work done (WD) = F. \Delta L
WD steel/ WD copper = Y cu/ Ys
Ycu/Ys < 1, so WD steel < WD copper

Question:9.17

What is the Young&rsquo;s modulus for a perfect rigid body?

Answer:

Young’s modulus
Y=\frac{FL}{A\Delta L}
Since the body is rigid, it cannot be deformed or reshaped.
Hence, \Delta L = 0
Y (rigid body) = \frac{FL}{0} = infinite

Question:9.18

What is the Bulk modulus for a perfect rigid body?

Answer:

Bulk modulus = \frac{-p(V)}{\Delta V}
Since the body is rigid, it cannot be deformed or reshaped and cannot be stretched.
Hence, \Delta V = 0
B (rigid body) = \frac{pV}{0}= infinite.

Question:9.21

To what depth must a rubber ball be taken in deep sea so that its volume is decreased by 0.1%.

Answer:

B = Bulk modulus = 9.8 \times 108 N/m^{2}
p = density of water = 1000 kg/m3
percentage change in volume = \frac{\Delta V}{V} \times 100 = 0.1
let h be the depth to which the rubber ball is being taken = hpg
p = B \times \frac{\Delta V}{V}
h \times 9.8 \times 10^3 = 9.8 \times 10^8 \times \frac{1}{1000}
hence, h=100 m


Question:9.23

Two identical solid balls, one of ivory and the other of wet-clay, are dropped from the same height on the floor. Which one will rise to a greater height after striking the flood and why?

Answer:

Both balls are dropped from the same height. This means the velocity with which they approach and strike the ground will be same. But the ivory ball is more elastic in nature than the wet clay ball, so it tries to get back to its original form as quickly as possible as compared to the wet clay ball. Hence, the amount energy transferred to the ivory ball is higher than that of clay ball and as a result it rises higher.

NCERT Exemplar Class 11 Physics Solutions Chapter 9: Long Answer

Question:9.24

Consider a long steel bar under a tensile stress due to forces F acting at the edges along the length of the bar. Consider a plane making an angle \theta with the length. What are the tensile and shearing stresses on this planet?
27
a) for what angle is the tensile stress a maximum?
b) for what angle is the shearing stress a maximum?

Answer:

28
a) Tensile stress = normal forces to the surface of plane F/ area
A = area of cross-section which is perpendicular to the bar
A’ = the area of plane cut along aa’ of the cross section
\sin \theta = \frac{A}{A^{'}}

The force perpendicular component along A or AA^{'}=\sin \theta
Tensile stress = \left ( \frac{F\sin \theta}{A} \right ) \times \sin \theta
For max value, sin θ should be equal to 1. Hence, \theta =\frac{\pi}{2}
b) Shearing stress = forces along the plane F/ area = F\frac{\cos \theta}{A^{'}}=\left ( \frac{F}{2A} \right )\times 2 \sin \theta \cos \theta = \left ( \frac{F}{2A} \right )\sin 2\theta
for shearing stress to be maximum, \sin 2 \theta =1
which gives us \theta =\frac{\pi}{4}

Question:9.25

a) A steel wire of mass μ per unit length with a circular cross-section has a radius of 0.1 cm. The wire is of length 10 m when measured lying horizontal, and hangs from a hook on the wall. A mass of 25 kg is hung from the free end of the wire. Assuming the wire to be uniform and lateral strains << longitudinal strains, find the extension in the length of the wire. The density of steel is 7860 kg/m3.
b) If the yield strength of steel is 2.5 × 108 N/m2, what is the maximum weight that can be hung at the lower end of the wire?

Answer:

An element dx is of mass dm taken from a wire of length L from a distance x. mass per unit length here is u.
dm = u.dx, r=0.1 cm = 0.001 m
A = \pi r^{2} = \pi (10)^{-6}
M = 25 kg, L =10m

a) The force that acts in the downward direction on dx = wt
T(x) = (x.u) g + Mg
Y = T\frac{\frac{x}{A}}{\frac{dr}{dx}}
dr is the increase in the length of wire
Y = \frac{T(x). dx}{A. dr}
dr = \frac{1}{AY} (xug + Mg) dx
integrating both sides we get,
r (change in length of wire) = 1/AY [ug x2/g + Mgx] L0
extension in wire of length L =
\frac{gL}{2 \pi r^{2}Y}[ul + 2M]
extension=
10\times 10 [0.25 + 2 \times 0.25] / (2\times 3.14 \times 10^{-6} \times 2 \times 10^{11})
extension = 400 \times 10^{-5} m mass m = volume x density =
(A.L) \times P = \pi r^{2} \times 10 \times 7860 = 0.25 kg
b) at x = L, the wire experiences maximum tension
T(x) = ugx + Mg
T(L) = ugL + Mg
T = (m + M) g {as uL = m}
Yield force = Yield strength x A
= 250 \times 3.14
Max tension = yield force
(m + M) g = 250 \times 3.14
M = \frac{785}{10} - 0.25 = 78.35 Kg

Question:9.26

A steel rod of length 2l, cross-sectional area A and mass M is set rotating in a horizontal plane about an axis passing through the centre. If Y is the Young’s modulus for steel, find the extension in the length of the rod.

Answer:

Dr element of the rod is at a distance of r from the centre. We assume Tr and T(r+dr) to be the tensions at points A and B.
Dr has a centrifugal force acting on it equal to T(r+dr) - T(r)
Centrifugal force = -dT in an outward direction.
Centripetal force as a result of the rotation, dr = dm rw^{2}
Hence, -dT = dm rw^{2}
If u is the mass per unit length, we have
-dT = u w^{2}r.dr
On integrating both sides we get,
-\int_{0}^{T}=dT=uw^{2}\int_{r}^{1}r.dr
tension in rod,
-T(r)=\frac{uw^{2}}{2}(l^{2}-r^{2}) --------------------------(1)
Y = stress/strain =
\frac{\frac{T(r)}{A}}{\frac{\delta r}{dr}}
{\frac{\delta r}{dr}}=\frac{T(r)}{AY}=\frac{uw^{2}}{2AY}\left ( l^{2} -r^{2}\right )dr
\int_{0}^{\delta }\delta r=\int_{0}^{l}\frac{(uw^{2})}{2AY}(l^{2}-r^{2})dr
\delta =\left ( \frac{uw^{2}}{2AY} \right )\left ( \frac{2}{3} \right )l^{3}
\delta =\frac{uw^{2}}{3AY}(l^{3})Since the extension is on both sides, total extension =
2\delta =2\frac{uw^{2}}{3AY}(l^{3})

Question:9.27

An equilateral triangle ABC is formed by two Cu rods AB and BC and one Al rod. It is heated in such a way that the temperature of each rod increases by \DeltaT. Find the change in the angle ABC.

Answer:

\cos \theta = \frac{l_1^{2}+l_3^{2}-l_2^{2}}{2l_1l_3}

2l_1l_3\cos \theta =l_1^{2}+l_3^{2}-l_2^{2}
30
Differentiating on both sides of the equation,
2[d (l_1 l_3) \cos \theta + l_1 l_3 d (\cos \theta)] = 2 l_1 dl_1 + 2 l_3 dl_3 - 2 l_2 dl_2
(l_1 dl_3 + l_3 dl_1) \cos \theta - l_1 l_3 \cos \theta d\theta = l_1 dl_1 + l_3 dl_3 - l_2 dl_2 --------------(1)
dl_1 = l_1 \alpha_ 1 \Delta t
dl_2 = l_2 \alpha_ 2 \Delta t
dl_3 = l_3 \alpha _3 \Delta t
L1 = L2 = L3
\\dl_1=dl_3=l\alpha_1\Delta t also dl_2 = l\alpha _2 \Delta t
substituting in 1, we get
\cos \theta (l^{ 2} \alpha_ 1 \Delta t + l^{2} \alpha_ 1 \Delta t) - l^{2} \sin \theta d\theta = l^{2} \alpha_1 \Delta t + l^{2} \alpha_1 \Delta t - l^{2} \alpha_2 \Delta t
2 \alpha _1 \Delta t \times \frac{1}{2}- 2 \alpha_ 1 \Delta t + \alpha_ 2 \Delta t = \frac{\sqrt{3}}{2}d \theta
d\theta = 2 (\alpha 2-\alpha 1) \frac{\Delta t }{\sqrt{3}}

Question:9.29

A stone of mass m is tied to an elastic string of negligible mass and spring constant k. The unstretched length of the string is L and has negligible mass. The other end of the string is fixed to a nail at a point P. Initially, the stone is at the same level as the point P. The stone is dropped vertically from point P.
a) find the distance y from the top when the mass comes to rest for an instant, for the first time
b) what is the maximum velocity attained by the stone in this drop?
c) what shall be the nature of the motion after the stone has reached its lowest point?

Answer:

32
The string is of length L, and stone is tied at P. The nail O is the point where the string is fixed. L is the height through which the stone is lifted. The stone tries to follow a path PP’ when it falls under the effect of gravity. But, due to elastic property of the string, it will follow a circular path from P to Q which gives rise to centrifugal force. The potential energy of the stone is converted to mechanical energy in the string with a spring constant K. PE of stone = Mechanical energy of the string
a) mgy = \frac{1}{2}K (y-L)^{2}
mgy = \frac{1}{2}K (y^{2}+L^{2}-2yL)
2mgy = Ky^{2} - 2KyL + KL^{2}
Ky^{2} - 2(KL+mg) y + KL^{2} = 0

Y=\frac{[KL+mg ]}{K}\pm \frac{\sqrt{mg(mg+2KL)}}{K}

b) At the lowest point, the acceleration is zero.
So, F = 0
Here the force of the string is balances by the force of gravity which makes, mg = Kx
If we assume v to be equal to maximum velocity then by the law of conservation of energy,
Kinetic energy of stone + Potential energy gained by the string = potential energy lost from P to Q’
\frac{1}{2}mv2 + \frac{1}{2} Kx^{2} = mg (L+x)
mv^{2} + Kx^{2} = 2mg(L+x)
x = \frac{mg}{K}
mv^{2} = 2mgL + \frac{2m^{2}g^{2}}{K}-\frac{m^{2}g^{2}}{K}
v = [2gL + \frac{mg^{2}}{K}]^{\frac{1}{2}}

c) From part a, at the lowest point
m \frac{d^{2}z}{dt^{2}} = mg - K(y-L)
\frac{d^{2}z}{dt^{2}} - g +\frac{K}{m(y-L)}= 0
z=\left [ \left ( y-L \right ) -\frac{mg}{K}\right ] {through transformation of variables}
\frac{d^{2}z}{dt^{2}} + \frac{k}{m} (z) = 0
This is a second order differential equation of the kind of simple harmonic motion.
w is the angular frequency, w=\sqrt{\frac{k}{m}}
The solution of such differential equation is of type z = A \cos (wt + \theta )
z= \left ( L+\frac{K}{m}g \right )+A^{'}\cos\left ( wt+\theta \right )
Hence, the stone undergoes simple harmonic motion about point y=0,
Hence, z_{0} = \left (L + \frac{mg}{K} \right )


Also, check NCERT Solutions for Class 11 other subjects

Class 11 Physics NCERT Exemplar solutions Chapter 9 include the following topics:

Main Subtopics in NCERT Exemplar Class 11 physics Solutions Chapter 9:

  • 9.1 Introduction
  • 9.2 Elastic behaviour of solids
  • 9.3 Stress and strain
  • 9.4 Hooke’s law
  • 9.5 Stress-strain curve
  • 9.6 Elastic moduli
  • 9.7 Applications of elastic behaviour of materials

Read NCERT Class 11 Physics Solutions

What Will Students Learn from NCERT Exemplar Class 11 Physics Solutions Chapter 9?

Here the topic might appear small and is relatively easy, but things are appearing easy to have difficult concepts at times. There are various mechanical properties of the solids, which are explained here in the chapter. NCERT Exemplar Class 11 Physics solutions chapter 9, will make the learning of the concepts an easier job. Factors such as elasticity, plasticity, types of stress- compressive, tensile, and longitudinal are mentioned in the chapter. Hooke’s law and Young’s modulus have been explained by practical experiments. The chapter says that deforming force in one direction can produce strains in another direction. Here, stress is said not to be a vector quantity because, unlike force, it cannot move in a specific direction. The difference between stress and strain is, restoring force per unit area and the fractional change in the dimensions, respectively.

NCERT Exemplar Class 11 Physics Solutions Chapter-Wise

NCERT Exemplar Class 11 Solutions

Important Topics To Cover For Exams From NCERT Exemplar Class 11 Physics Solutions Chapter 9

It is important that students cover some key topics from this chapter for exams. Here are a few of them:

· NCERT Exemplar Class 11 Physics solutions chapter 9, covers all the important and needed topics in the chapter. It is explained with utter ease and various types of practical explanations.

· Hooke’s law tells us how for small deformations stress is directly proportional to strain for many materials.

· Young’s module is defined as the ratio of tensile (or compressive) stress (s) to the longitudinal strain (e).

· Basic terms of altitude, elasticity, strain, plasticity, stress, etc. are explained in detail.

· The actual meaning of elasticity is not of how long a material stretches but in fact something that extends lesser, in a given load.

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Also, check NCERT Notes subject wise -

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Frequently Asked Question (FAQs)

1. How many questions are solved in the solution?

A total set of 21 questions are solved in the solution manual. The questions include long answer type, short answer type and MCQs

2. What will be the benefits of studying from the Class 11 Physics NCERT Exemplar solutions Chapter 9?

The benefit of studying from NCERT Exemplar Class 11 Physics Solutions Chapter 9, is that it would help students score better in their JEE Main and NEET examinations.

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Articles

Get answers from students and experts

A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

Option 2)

200 \, \, J - 500 \, \, J

Option 3)

2\times 10^{5}J-3\times 10^{5}J

Option 4)

20,000 \, \, J - 50,000 \, \, J

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced

Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

Option 2)

increase two fold

Option 3)

remain unchanged

Option 4)

be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

Option 4)

558.5 × 6.023 × 1023

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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Bio Medical Engineer

The field of biomedical engineering opens up a universe of expert chances. An Individual in the biomedical engineering career path work in the field of engineering as well as medicine, in order to find out solutions to common problems of the two fields. The biomedical engineering job opportunities are to collaborate with doctors and researchers to develop medical systems, equipment, or devices that can solve clinical problems. Here we will be discussing jobs after biomedical engineering, how to get a job in biomedical engineering, biomedical engineering scope, and salary. 

4 Jobs Available
Ethical Hacker

A career as ethical hacker involves various challenges and provides lucrative opportunities in the digital era where every giant business and startup owns its cyberspace on the world wide web. Individuals in the ethical hacker career path try to find the vulnerabilities in the cyber system to get its authority. If he or she succeeds in it then he or she gets its illegal authority. Individuals in the ethical hacker career path then steal information or delete the file that could affect the business, functioning, or services of the organization.

3 Jobs Available
GIS Expert

GIS officer work on various GIS software to conduct a study and gather spatial and non-spatial information. GIS experts update the GIS data and maintain it. The databases include aerial or satellite imagery, latitudinal and longitudinal coordinates, and manually digitized images of maps. In a career as GIS expert, one is responsible for creating online and mobile maps.

3 Jobs Available
Data Analyst

The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.

Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.

3 Jobs Available
Geothermal Engineer

Individuals who opt for a career as geothermal engineers are the professionals involved in the processing of geothermal energy. The responsibilities of geothermal engineers may vary depending on the workplace location. Those who work in fields design facilities to process and distribute geothermal energy. They oversee the functioning of machinery used in the field.

3 Jobs Available
Database Architect

If you are intrigued by the programming world and are interested in developing communications networks then a career as database architect may be a good option for you. Data architect roles and responsibilities include building design models for data communication networks. Wide Area Networks (WANs), local area networks (LANs), and intranets are included in the database networks. It is expected that database architects will have in-depth knowledge of a company's business to develop a network to fulfil the requirements of the organisation. Stay tuned as we look at the larger picture and give you more information on what is db architecture, why you should pursue database architecture, what to expect from such a degree and what your job opportunities will be after graduation. Here, we will be discussing how to become a data architect. Students can visit NIT Trichy, IIT Kharagpur, JMI New Delhi

3 Jobs Available
Remote Sensing Technician

Individuals who opt for a career as a remote sensing technician possess unique personalities. Remote sensing analysts seem to be rational human beings, they are strong, independent, persistent, sincere, realistic and resourceful. Some of them are analytical as well, which means they are intelligent, introspective and inquisitive. 

Remote sensing scientists use remote sensing technology to support scientists in fields such as community planning, flight planning or the management of natural resources. Analysing data collected from aircraft, satellites or ground-based platforms using statistical analysis software, image analysis software or Geographic Information Systems (GIS) is a significant part of their work. Do you want to learn how to become remote sensing technician? There's no need to be concerned; we've devised a simple remote sensing technician career path for you. Scroll through the pages and read.

3 Jobs Available
Budget Analyst

Budget analysis, in a nutshell, entails thoroughly analyzing the details of a financial budget. The budget analysis aims to better understand and manage revenue. Budget analysts assist in the achievement of financial targets, the preservation of profitability, and the pursuit of long-term growth for a business. Budget analysts generally have a bachelor's degree in accounting, finance, economics, or a closely related field. Knowledge of Financial Management is of prime importance in this career.

4 Jobs Available
Data Analyst

The invention of the database has given fresh breath to the people involved in the data analytics career path. Analysis refers to splitting up a whole into its individual components for individual analysis. Data analysis is a method through which raw data are processed and transformed into information that would be beneficial for user strategic thinking.

Data are collected and examined to respond to questions, evaluate hypotheses or contradict theories. It is a tool for analyzing, transforming, modeling, and arranging data with useful knowledge, to assist in decision-making and methods, encompassing various strategies, and is used in different fields of business, research, and social science.

3 Jobs Available
Underwriter

An underwriter is a person who assesses and evaluates the risk of insurance in his or her field like mortgage, loan, health policy, investment, and so on and so forth. The underwriter career path does involve risks as analysing the risks means finding out if there is a way for the insurance underwriter jobs to recover the money from its clients. If the risk turns out to be too much for the company then in the future it is an underwriter who will be held accountable for it. Therefore, one must carry out his or her job with a lot of attention and diligence.

3 Jobs Available
Finance Executive
3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Operations Manager

Individuals in the operations manager jobs are responsible for ensuring the efficiency of each department to acquire its optimal goal. They plan the use of resources and distribution of materials. The operations manager's job description includes managing budgets, negotiating contracts, and performing administrative tasks.

3 Jobs Available
Stock Analyst

Individuals who opt for a career as a stock analyst examine the company's investments makes decisions and keep track of financial securities. The nature of such investments will differ from one business to the next. Individuals in the stock analyst career use data mining to forecast a company's profits and revenues, advise clients on whether to buy or sell, participate in seminars, and discussing financial matters with executives and evaluate annual reports.

2 Jobs Available
Researcher

A Researcher is a professional who is responsible for collecting data and information by reviewing the literature and conducting experiments and surveys. He or she uses various methodological processes to provide accurate data and information that is utilised by academicians and other industry professionals. Here, we will discuss what is a researcher, the researcher's salary, types of researchers.

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

5 Jobs Available
Transportation Planner

A career as Transportation Planner requires technical application of science and technology in engineering, particularly the concepts, equipment and technologies involved in the production of products and services. In fields like land use, infrastructure review, ecological standards and street design, he or she considers issues of health, environment and performance. A Transportation Planner assigns resources for implementing and designing programmes. He or she is responsible for assessing needs, preparing plans and forecasts and compliance with regulations.

3 Jobs Available
Environmental Engineer

Individuals who opt for a career as an environmental engineer are construction professionals who utilise the skills and knowledge of biology, soil science, chemistry and the concept of engineering to design and develop projects that serve as solutions to various environmental problems. 

2 Jobs Available
Safety Manager

A Safety Manager is a professional responsible for employee’s safety at work. He or she plans, implements and oversees the company’s employee safety. A Safety Manager ensures compliance and adherence to Occupational Health and Safety (OHS) guidelines.

2 Jobs Available
Conservation Architect

A Conservation Architect is a professional responsible for conserving and restoring buildings or monuments having a historic value. He or she applies techniques to document and stabilise the object’s state without any further damage. A Conservation Architect restores the monuments and heritage buildings to bring them back to their original state.

2 Jobs Available
Structural Engineer

A Structural Engineer designs buildings, bridges, and other related structures. He or she analyzes the structures and makes sure the structures are strong enough to be used by the people. A career as a Structural Engineer requires working in the construction process. It comes under the civil engineering discipline. A Structure Engineer creates structural models with the help of computer-aided design software. 

2 Jobs Available
Highway Engineer

Highway Engineer Job Description: A Highway Engineer is a civil engineer who specialises in planning and building thousands of miles of roads that support connectivity and allow transportation across the country. He or she ensures that traffic management schemes are effectively planned concerning economic sustainability and successful implementation.

2 Jobs Available
Field Surveyor

Are you searching for a Field Surveyor Job Description? A Field Surveyor is a professional responsible for conducting field surveys for various places or geographical conditions. He or she collects the required data and information as per the instructions given by senior officials. 

2 Jobs Available
Orthotist and Prosthetist

Orthotists and Prosthetists are professionals who provide aid to patients with disabilities. They fix them to artificial limbs (prosthetics) and help them to regain stability. There are times when people lose their limbs in an accident. In some other occasions, they are born without a limb or orthopaedic impairment. Orthotists and prosthetists play a crucial role in their lives with fixing them to assistive devices and provide mobility.

6 Jobs Available
Pathologist

A career in pathology in India is filled with several responsibilities as it is a medical branch and affects human lives. The demand for pathologists has been increasing over the past few years as people are getting more aware of different diseases. Not only that, but an increase in population and lifestyle changes have also contributed to the increase in a pathologist’s demand. The pathology careers provide an extremely huge number of opportunities and if you want to be a part of the medical field you can consider being a pathologist. If you want to know more about a career in pathology in India then continue reading this article.

5 Jobs Available
Veterinary Doctor
5 Jobs Available
Speech Therapist
4 Jobs Available
Gynaecologist

Gynaecology can be defined as the study of the female body. The job outlook for gynaecology is excellent since there is evergreen demand for one because of their responsibility of dealing with not only women’s health but also fertility and pregnancy issues. Although most women prefer to have a women obstetrician gynaecologist as their doctor, men also explore a career as a gynaecologist and there are ample amounts of male doctors in the field who are gynaecologists and aid women during delivery and childbirth. 

4 Jobs Available
Audiologist

The audiologist career involves audiology professionals who are responsible to treat hearing loss and proactively preventing the relevant damage. Individuals who opt for a career as an audiologist use various testing strategies with the aim to determine if someone has a normal sensitivity to sounds or not. After the identification of hearing loss, a hearing doctor is required to determine which sections of the hearing are affected, to what extent they are affected, and where the wound causing the hearing loss is found. As soon as the hearing loss is identified, the patients are provided with recommendations for interventions and rehabilitation such as hearing aids, cochlear implants, and appropriate medical referrals. While audiology is a branch of science that studies and researches hearing, balance, and related disorders.

3 Jobs Available
Oncologist

An oncologist is a specialised doctor responsible for providing medical care to patients diagnosed with cancer. He or she uses several therapies to control the cancer and its effect on the human body such as chemotherapy, immunotherapy, radiation therapy and biopsy. An oncologist designs a treatment plan based on a pathology report after diagnosing the type of cancer and where it is spreading inside the body.

3 Jobs Available
Anatomist

Are you searching for an ‘Anatomist job description’? An Anatomist is a research professional who applies the laws of biological science to determine the ability of bodies of various living organisms including animals and humans to regenerate the damaged or destroyed organs. If you want to know what does an anatomist do, then read the entire article, where we will answer all your questions.

2 Jobs Available
Actor

For an individual who opts for a career as an actor, the primary responsibility is to completely speak to the character he or she is playing and to persuade the crowd that the character is genuine by connecting with them and bringing them into the story. This applies to significant roles and littler parts, as all roles join to make an effective creation. Here in this article, we will discuss how to become an actor in India, actor exams, actor salary in India, and actor jobs. 

4 Jobs Available
Acrobat

Individuals who opt for a career as acrobats create and direct original routines for themselves, in addition to developing interpretations of existing routines. The work of circus acrobats can be seen in a variety of performance settings, including circus, reality shows, sports events like the Olympics, movies and commercials. Individuals who opt for a career as acrobats must be prepared to face rejections and intermittent periods of work. The creativity of acrobats may extend to other aspects of the performance. For example, acrobats in the circus may work with gym trainers, celebrities or collaborate with other professionals to enhance such performance elements as costume and or maybe at the teaching end of the career.

3 Jobs Available
Video Game Designer

Career as a video game designer is filled with excitement as well as responsibilities. A video game designer is someone who is involved in the process of creating a game from day one. He or she is responsible for fulfilling duties like designing the character of the game, the several levels involved, plot, art and similar other elements. Individuals who opt for a career as a video game designer may also write the codes for the game using different programming languages.

Depending on the video game designer job description and experience they may also have to lead a team and do the early testing of the game in order to suggest changes and find loopholes.

3 Jobs Available
Radio Jockey

Radio Jockey is an exciting, promising career and a great challenge for music lovers. If you are really interested in a career as radio jockey, then it is very important for an RJ to have an automatic, fun, and friendly personality. If you want to get a job done in this field, a strong command of the language and a good voice are always good things. Apart from this, in order to be a good radio jockey, you will also listen to good radio jockeys so that you can understand their style and later make your own by practicing.

A career as radio jockey has a lot to offer to deserving candidates. If you want to know more about a career as radio jockey, and how to become a radio jockey then continue reading the article.

3 Jobs Available
Choreographer

The word “choreography" actually comes from Greek words that mean “dance writing." Individuals who opt for a career as a choreographer create and direct original dances, in addition to developing interpretations of existing dances. A Choreographer dances and utilises his or her creativity in other aspects of dance performance. For example, he or she may work with the music director to select music or collaborate with other famous choreographers to enhance such performance elements as lighting, costume and set design.

2 Jobs Available
Social Media Manager

A career as social media manager involves implementing the company’s or brand’s marketing plan across all social media channels. Social media managers help in building or improving a brand’s or a company’s website traffic, build brand awareness, create and implement marketing and brand strategy. Social media managers are key to important social communication as well.

2 Jobs Available
Photographer

Photography is considered both a science and an art, an artistic means of expression in which the camera replaces the pen. In a career as a photographer, an individual is hired to capture the moments of public and private events, such as press conferences or weddings, or may also work inside a studio, where people go to get their picture clicked. Photography is divided into many streams each generating numerous career opportunities in photography. With the boom in advertising, media, and the fashion industry, photography has emerged as a lucrative and thrilling career option for many Indian youths.

2 Jobs Available
Producer

An individual who is pursuing a career as a producer is responsible for managing the business aspects of production. They are involved in each aspect of production from its inception to deception. Famous movie producers review the script, recommend changes and visualise the story. 

They are responsible for overseeing the finance involved in the project and distributing the film for broadcasting on various platforms. A career as a producer is quite fulfilling as well as exhaustive in terms of playing different roles in order for a production to be successful. Famous movie producers are responsible for hiring creative and technical personnel on contract basis.

2 Jobs Available
Copy Writer

In a career as a copywriter, one has to consult with the client and understand the brief well. A career as a copywriter has a lot to offer to deserving candidates. Several new mediums of advertising are opening therefore making it a lucrative career choice. Students can pursue various copywriter courses such as Journalism, Advertising, Marketing Management. Here, we have discussed how to become a freelance copywriter, copywriter career path, how to become a copywriter in India, and copywriting career outlook. 

5 Jobs Available
Vlogger

In a career as a vlogger, one generally works for himself or herself. However, once an individual has gained viewership there are several brands and companies that approach them for paid collaboration. It is one of those fields where an individual can earn well while following his or her passion. 

Ever since internet costs got reduced the viewership for these types of content has increased on a large scale. Therefore, a career as a vlogger has a lot to offer. If you want to know more about the Vlogger eligibility, roles and responsibilities then continue reading the article. 

3 Jobs Available
Publisher

For publishing books, newspapers, magazines and digital material, editorial and commercial strategies are set by publishers. Individuals in publishing career paths make choices about the markets their businesses will reach and the type of content that their audience will be served. Individuals in book publisher careers collaborate with editorial staff, designers, authors, and freelance contributors who develop and manage the creation of content.

3 Jobs Available
Journalist

Careers in journalism are filled with excitement as well as responsibilities. One cannot afford to miss out on the details. As it is the small details that provide insights into a story. Depending on those insights a journalist goes about writing a news article. A journalism career can be stressful at times but if you are someone who is passionate about it then it is the right choice for you. If you want to know more about the media field and journalist career then continue reading this article.

3 Jobs Available
Editor

Individuals in the editor career path is an unsung hero of the news industry who polishes the language of the news stories provided by stringers, reporters, copywriters and content writers and also news agencies. Individuals who opt for a career as an editor make it more persuasive, concise and clear for readers. In this article, we will discuss the details of the editor's career path such as how to become an editor in India, editor salary in India and editor skills and qualities.

3 Jobs Available
Reporter

Individuals who opt for a career as a reporter may often be at work on national holidays and festivities. He or she pitches various story ideas and covers news stories in risky situations. Students can pursue a BMC (Bachelor of Mass Communication), B.M.M. (Bachelor of Mass Media), or MAJMC (MA in Journalism and Mass Communication) to become a reporter. While we sit at home reporters travel to locations to collect information that carries a news value.  

2 Jobs Available
Corporate Executive

Are you searching for a Corporate Executive job description? A Corporate Executive role comes with administrative duties. He or she provides support to the leadership of the organisation. A Corporate Executive fulfils the business purpose and ensures its financial stability. In this article, we are going to discuss how to become corporate executive.

2 Jobs Available
Multimedia Specialist

A multimedia specialist is a media professional who creates, audio, videos, graphic image files, computer animations for multimedia applications. He or she is responsible for planning, producing, and maintaining websites and applications. 

2 Jobs Available
Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

5 Jobs Available
QA Manager
4 Jobs Available
Quality Controller

A quality controller plays a crucial role in an organisation. He or she is responsible for performing quality checks on manufactured products. He or she identifies the defects in a product and rejects the product. 

A quality controller records detailed information about products with defects and sends it to the supervisor or plant manager to take necessary actions to improve the production process.

3 Jobs Available
Production Manager
3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
QA Lead

A QA Lead is in charge of the QA Team. The role of QA Lead comes with the responsibility of assessing services and products in order to determine that he or she meets the quality standards. He or she develops, implements and manages test plans. 

2 Jobs Available
Structural Engineer

A Structural Engineer designs buildings, bridges, and other related structures. He or she analyzes the structures and makes sure the structures are strong enough to be used by the people. A career as a Structural Engineer requires working in the construction process. It comes under the civil engineering discipline. A Structure Engineer creates structural models with the help of computer-aided design software. 

2 Jobs Available
Process Development Engineer

The Process Development Engineers design, implement, manufacture, mine, and other production systems using technical knowledge and expertise in the industry. They use computer modeling software to test technologies and machinery. An individual who is opting career as Process Development Engineer is responsible for developing cost-effective and efficient processes. They also monitor the production process and ensure it functions smoothly and efficiently.

2 Jobs Available
QA Manager
4 Jobs Available
AWS Solution Architect

An AWS Solution Architect is someone who specializes in developing and implementing cloud computing systems. He or she has a good understanding of the various aspects of cloud computing and can confidently deploy and manage their systems. He or she troubleshoots the issues and evaluates the risk from the third party. 

4 Jobs Available
Azure Administrator

An Azure Administrator is a professional responsible for implementing, monitoring, and maintaining Azure Solutions. He or she manages cloud infrastructure service instances and various cloud servers as well as sets up public and private cloud systems. 

4 Jobs Available
Computer Programmer

Careers in computer programming primarily refer to the systematic act of writing code and moreover include wider computer science areas. The word 'programmer' or 'coder' has entered into practice with the growing number of newly self-taught tech enthusiasts. Computer programming careers involve the use of designs created by software developers and engineers and transforming them into commands that can be implemented by computers. These commands result in regular usage of social media sites, word-processing applications and browsers.

3 Jobs Available
Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

3 Jobs Available
Information Security Manager

Individuals in the information security manager career path involves in overseeing and controlling all aspects of computer security. The IT security manager job description includes planning and carrying out security measures to protect the business data and information from corruption, theft, unauthorised access, and deliberate attack 

3 Jobs Available
ITSM Manager
3 Jobs Available
Automation Test Engineer

An Automation Test Engineer job involves executing automated test scripts. He or she identifies the project’s problems and troubleshoots them. The role involves documenting the defect using management tools. He or she works with the application team in order to resolve any issues arising during the testing process. 

2 Jobs Available
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