NCERT Solutions For Class 10 Science Chapter 12 Electricity
NCERT solutions for class 10 science chapter 12: Students preparing for CBSE class 10 board exams, must know that NCERT class 10 Science chapter 12 is one of the most vital chapters. This is a scoring chapter and NCERT solutions for Class 10 Science chapter 12 Electricity. So it will be good for you if you clear your concepts. The NCERT Class 10 Science chapter 12 solutions will help you understand those terms and things related to electrical energy. Since CBSE class 10 is a board class it is extremely important to understand topics carefully. The class 10 Science chapter 12 NCERT solutions will help you score well in the CBSE board exam. Students are advised to go through NCERT solutions for class 10 Science chapter 12 PDF to score good marks in the Board examination. Complete the electricity class 10 NCERT syllabus at the earliest to revise in a proper way. Refer to the NCERT Class 10 Science books and cover all the topics for scoring well in the exams.
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Discover the top sources for class 10 electricity solutions at Careers360. Our material is the result of the expertise and academic knowledge of our experienced faculty and specialists. In addition to offering the finest NCERT solutions, we aim to provide the highest level of educational information. Though the content may be complex, we have made sure that the language used is straightforward and that all technical terms are thoroughly explained.
Also students can refer,
- NCERT Exemplar Solutions for Class 10 Science Chapter Electricity
- NCERT Notes for Class 10 Science Chapter Electricity
NCERT solutions for class 10 science chapter 12 Electricity topic 12.1
Q.1 What does an electric circuit mean?
Answer:
A closed and continuous path of electric current is known as the electric circuit. It consists of electric circuit elements like battery, resistors, etc and electric devices like a switch and measuring devices like ammeters, etc.
Q.2 Define the unit of current.
Answer:
Ampere(A) is unit of current.1A is flow of 1C of charge through a wire in 1s of time.
Q.3 Calculate the number of electrons constituting one coulomb of charge.
Answer:
Given: Q=1C
We know that the charge of an electron
Thus, the number of electrons constituting one coulomb of charge is electrons.
NCERT solutions for class 10 science chapter 12 Electricity topic 12.2
Q.1 Name a device that helps to maintain a potential difference across a conductor.
Answer:
Battery, cell or power supply source helps to maintain a potential difference across a conductor.
Q.2 What is meant by saying that the potential difference between two points is 1 V?
Answer:
The potential difference between two points is 1 V means 1 J of work is required to move a charge of amount 1C from one point to another.
Q.3 How much energy is given to each coulomb of charge passing through a 6 V battery?
Answer:
Given : potential difference = 6V and carge =1C.
J
Thus, 6J energy is given to each coulomb of charge passing through a 6 V battery.
NCERT solutions for class 10 science chapter 12 Electricity topic 12.5
Q.1 On what factors does the resistance of a conductor depend?
Answer:
The resistance of a conductor depends on :
1. Cross section area of the conductor.
2.length of conductor
3.The temperature of the conductor.
4. Nature of material of the conductor.
Answer:
We know that resistance is given as
R=resistance
=resistivity
l=length of wire
A=area of cross section
Resistance is inversely proportional to the area of cross-section.
Thicker the wire more is cross-sectional area resulting in less resistance resulting in more current flow.
Answer:
By Ohm's law,
V=IR
V= potential difference
I =current
R = resistance
Now, the potential difference is reduced to half i.e.
R' = R=resistance
I' =current
Current flowing is reduced to half.
Q.4 Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?
Answer:
The resistivity of an alloy is higher than pure metal so alloy does not melt at high temperature. Thus, coils of electric toasters and electric irons made of an alloy rather than a pure metal.
Q.5 Use the data in Table 12.2 to answer the following –
(a) Which among iron and mercury is a better conductor?
(b) Which material is the best conductor?
Answer:
Lower the value of resistivity lower will be the resistance for a material of given area and length. If resistance is law current flow will be high when a potential difference is applied across the conductor.
(a).resistivity of iron =
the resistivity of mercury =
the resistivity of mercury is more than iron so iron is a better conductor than mercury.
(b).From the table, we can observe silver has the lowest resistivity so it is the best conductor.
NCERT solutions for class 10 science chapter 12 Electricity topic 12.6
Answer:
The schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a resistor, an
resistor, and a
resistor, and a plug key, all connected in series is as shown below :
Answer:
The diagram is as shown :
Resistance of circuit =R=5+8+12=25
Potential = 6V
Now, for 12 ohm resistor, current = 0.24 A.
By Ohm's law,
The reading of the ammeter is o.24A and the voltmeter is 2.88V.
NCERT solutions for class 10 science chapter 12 Electricity topic 12.6.2
Q.1 Judge the equivalent resistance when the following are connected in parallel –
Answer:
R=Equivalent resistance
R=Equivalent resistance
Answer:
Given :
R=Equivalent resistance
By Ohm's law,
Hence, the resistance of electric iron is 31.25 and current through it is 7.04A.
Answer:
In parallel, there is no division of voltage among the appliances so the potential difference across all appliance is equal and the total effective resistance of a circuit can be reduced. Hence, connecting electrical devices in parallel with the battery is beneficial instead of connecting them in series.
Q.4 How can three resistors of resistances be connected to give a total resistance of
Answer:
(a)
R=Equivalent resistance
(b).1 Ohm
R=Equivalent resistance
Connect all the three resistors in parallel
Answer:
(a) the highest total resistance is obtained when all the resistors are connected in series
Answer :
(b) the lowest total resistance is R is obtained when all the resistors are connected in parallel.
Q. 1. Why does the cord of an electric heater not glow while the heating element does?
Answer:
The heating element of an electric heater is a resistor.
The amount of heat production is given as , .
The resistance of elements (alloys) of an electric heater is high. As current flow through this element, it becomes hot and glows red.
The resistance of cord (metal like Cu or Al)of an electric heater is low. As current flow through this element, it does not becomes hot and does not glow red.
Answer:
Given : potential difference = 50 V.
Charge = 9600 C
time = 1 hr=3600 s
So,
Q.3 An electric iron of resistance takes a current of 5 A. Calculate the heat developed in 30 s.
Answer:
Given : resistance=R= , TIME =30s , current =I=5A
NCERT solutions for class 10 science chapter 12 Electricity topic 12.8
Q.1 What determines the rate at which energy is delivered by a current?
Answer:
The rate at which energy is delivered by a current is power.
Power P=I 2 R, where I is the current and R is the resistance of the circuit/ appliance. Power depends on the current drawn by the appliance and the resistance of the appliance.
Answer:
Given: I= 5 A and V= 220 V.
Power=P=VI
Time = 2hr=
The energy consumed =
Power of motor = 1100W
Energy consumed by motor = 7920000J
NCERT solutions for class 10 science chapter 12 Electricity- Exercise solutions
(a) 1/25 (b) 1/5 (c) 5 (d) 25
Answer:
Given: A piece of wire of resistance is cut into five equal parts.
Resistance of each part is .
Hence,
Thus, option D is correct.
Q. 2 . Which of the following terms does not represent electrical power in a circuit?
Answer:
We know that power = P=VI....................................1
Put , V=IR in equation 1
Pur , in equation 1,
P= power, V=potencial difference, I= current,R=resistance
P cannot be .
Thus, option B is correct.
Q. 3. An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be
(a) 100 W (b) 75 W (c) 50 W (d) 25 W
Answer:
Given : V=220V,P=100W
The resistance of the bulb
If bulb is operated on 110 Vand resistance is the same , the power consumed will be P'
Hence, option D is correct.
(a) 1:2 (b) 2:1 (c) 1:4 (d) 4:1
Answer:
If resistors are connected in parallel, the net resistance is given as
If resistors are connected in series, the net resistance is given as
Heat produced = H =
Thus, option C is correct.
Q. 5. How is a voltmeter connected in the circuit to measure the potential difference between two points?
Answer:
A voltmeter should be connected in parallel, to measure the potential difference between two points.
Answer:
Given : diameter=d= 0.5 mm and resistivity = =
m.,resistance =R=10
Area =A
We know
If the diameter is doubled.
d=1 mm
Area =A'
We know
Hence, new resistance is of original resistance.
I (amperes) 0.5 1.0 2.0 3.0 4.0
V (volts) 1.6 3.4 6.7 10.2 13.2
Plot a graph between V and I and calculate the resistance of that resistor
Answer:
The plot between voltage and current is as shown :
The slope of the line gives resistance (R)
Answer:
Given : V=12V , I = 2.5 mA = 0.0025 A
Answer:
Total resistance =R
V = 9V
Hence, All resistors are in series so 0.67A current would flow through the resistor.
Q.10. How many resistors (in parallel) are required to carry 5 A on a 220 V line?
Answer:
Given: V=220V and I =5A
Let x number of resistors are connected in parallel to obtain 44 Ohm equivalent resistance.
Thus,
Hence, 4 resistors of 176 Ohm are connected in parallel to obtain 44 Ohm.
Answer:
(i)
R=Equivalent resistance
(ii)
.
R=Equivalent resistance
Answer:
Given: V=220V and P=10W
Let x be the number of bulbs.
I = 5A and V=220V
For x bulbs of resistance 4680 Ohm, are connected in parallel to obtain 44 Ohm equivalent resistance.
Thus,
Hence, 110 bulbs of 4840 Ohm are connected in parallel to obtain 44 Ohm.
Q.13. A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases?
Answer:
Given : V=220V and Resistance of each coil=R =24A
When coil is used separately,current in coil is
When two coils are connected in series, net resistance is
current in coil is I'
When two coils are connected in parallel, net resistance is
current in the coil is I''
Q.14. Compare the power used in the resistor in each of the following circuits:
(i) a 6 V battery in series with and
resistors
(ii) a 4 V battery in parallel with and
resistors.
Answer:
i) Given: V=6V
R=1+2=3Ohm
In, a series current is constant.
So, power =P
ii) Given: V=6V , R=2 Ohm
In, parallel combination voltage in the circuit is constant.
So, power =P
Answer:
Given :
For lamp one: Power = P1=100W and V = 220V
For lamp two: Power = P2=60W and V = 220V
Thus, the net current drawn from the supply is 0.455+0.273=0.728A
Q.16. Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?
Answer:
For TV set :
Given : Power = 250W and time = 1 hr = 3600 seconds
Energy consumed = H=PI
For toaster :
Given : Power = 1200W and time = 10 minutes = 600 seconds
Energy consumed = H=PI
Thus, the TV set uses more energy than a toaster.
Q.17. An electric heater of resistance draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.
Answer:
Given: R=8 Ohm ,I=15A and t= 2hr
The heat developed in the heater is H.
The rate at which heat is developed is given as
Q.18(a). Explain the following.
(a) Why is the tungsten used almost exclusively for filament of electric lamps?
Answer:
The tungsten used almost exclusively for filament of electric lamps because the melting point of tungsten is very high. The bulb glows at a very high temperature. So tungsten filament does not melt when bulb glows.
Q.18.(b) Explain the following.
Answer:
The conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal because the resistivity of the alloy is more than a pure metal. So the resistance will be hight and the heating effect will be high.
Q.18.(c) Explain the following.
(c) Why is the series arrangement not used for domestic circuits?
Answer:
If any of the elements in the circuit get damaged the entire circuit will be affected. If an element brake there will not be any current flow through the circuit. So the series circuit is not preferred in the domestic circuit.
Q.18.(d) Explain the following.
(d) How does the resistance of a wire vary with its area of cross-section?
Answer:
We know that
Thus, the resistance of a wire is inversely proportional to its area of cross-section.
Q.18.(e) Explain the following.
(e) Why are copper and aluminium wires usually employed for electricity transmission?
Answer:
Copper and aluminium wires usually employed for electricity transmission because they have low resistivity and they are good conductors of electricity.
About NCERT Class 10 Science chapter 12 Electricity
The ch 12 science class 10 is one of the most important chapters that will help in learning about electrical energy. To give a better understanding of the chapter we have provided NCERT solutions for class 10 Science chapter 12 above. Students will learn about water, steam, and nuclear energy, etc. NCERT Class 10 Science chapter 12 also includes some other topics related to resistors. The main aim of NCERT solutions for class 10 science chapter 12 is to give a better knowledge of how to use the concept while answering the questions.
Key Features of Electricity Class 10 NCERT Solutions
The electricity class 10 solutions covers answers to in text questions and exercise questions. The NCERT Solutions for Electricity Class 10 contains both numerical and theoretical problems. Electricity class 10 numericals are solved by listing the necessary equations and steps. There are 18 questions in the NCERT exercise of Class 10 Science chapter Electricity.
Topics of NCERT solutions for class 10 science chapter 12
Some of the important topics that are needed to be studied to practice electricity class 10 NCERT solutions are:
Electric current potential
Electric resistance
Circuit diagrams
Ohm's law
The heating effect of electric current and power.
The electric current can be classified as direct current (DC) and alternating current ac (AC).
Some key points to remember from class 10 Science chapter 12 NCERT solutions:
Current flows from the positive terminal to the negative terminal of a circuit.
A voltmeter is always connected in parallel across the circuit whereas an ammeter is always connected in series with the circuit whose current is to be measured.
Reciprocal of the resistance is known as conductance whereas reciprocal resistivity is known as conductivity.
NCERT Solutions for Class 10 Science - Chapter wise
Chapter No. | Chapter Name |
Chapter 1 | Chemical Reactions and Equations |
Chapter 2 | Acids, Bases, and Salts |
Chapter 3 | Metals and Non-metals |
Chapter 4 | Carbon and its Compounds |
Chapter 5 | Periodic Classification of Elements |
Chapter 6 | Life Processes |
Chapter 7 | Control and Coordination |
Chapter 8 | How do Organisms Reproduce? |
Chapter 9 | Heredity and Evolution |
Chapter 10 | Light Reflection and Refraction |
Chapter 11 | The Human Eye and The Colorful World |
Chapter 12 | Electricity |
Chapter 13 | Magnetic Effects of Electric Current |
Chapter 14 | Sources of Energy |
Chapter 15 | Our Environment |
Chapter 16 | Sustainable Management of Natural Resources |
NCERT solutions for class 10 - Subject wise
Highlights of NCERT Solutions for class 10 science Chapter 12 Electricity
The given class 10 Science chapter 12 NCERT solutions will help boost your knowledge.
Practicing concepts and questions plays a vital role while preparing for class 10 board exams.
NCERT solutions for class 10 science Chapter 12 is the best study material you can have for exam preparation.
Also Check NCERT Books and NCERT Syllabus here:
- NCERT Books Class 10 Science
- NCERT Syllabus Class 10 Science
- NCERT Books Class 10
- NCERT Syllabus Class 10
Frequently Asked Question (FAQs) - NCERT Solutions For Class 10 Science Chapter 12 Electricity
Question: Why is it beneficial for students to obtain ncert solutions for class 10 science electricity in PDF format?
Answer:
The PDF format of class 10 electricity solutions Chapter 12 provides diagrams and solutions to all questions which are present in the textbook. The answers are designed with consideration for the comprehension level of students, and they strictly align with the CBSE syllabus and exam pattern, allowing students to approach exams with confidence.
Question: How many practice questions are included in chapter 12 class 10 science?
Answer:
class 10 science chapter 12 exercise solutions contains the following number of exercises and questions:
Exercise 12.1 includes 3 questions.
Exercise 12.2 consists of 3 questions.
Exercise 12.3 has 5 questions.
Exercise 12.4 comprises 2 questions.
Exercise 12.5 has 5 questions.
Exercise 12.6 contains 3 questions.
Exercise 12.7 comprises 2 questions.
Exercise 12.8 has 18 questions.
Question: Is NCERT Class 10 Science chapter 12 Electricity useful in class 11 and 12?
Answer:
Yes, it helps in higher studies if students chooses the Science stream because class 12 has current electricity chapter in syllabus.
Question: Is NCERT exercise enough to solve questions in the board exam?
Answer:
Along with questions and concepts of class 10 chapter, practicing CBSE previous year question papers are mandatory for board exams.
Question: What is the weightage of NCERT chapter 12 electricity for CBSE board exam?
Answer:
Class 10 Science Chapter 12 Electricity carries 6 to 8 marks.
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Questions related to CBSE Class 10th
my sons dob is 13/02/2009 is hi eligible for 10th board exam in 2024,,from cbse. olz reply me
The eligibility age criteria for class 10th CBSE is 14 years of age. Since your son will be 15 years of age in 2024, he will be eligible to give the exam.
can Hindi marks be replace with IT 402(additional subject) in CBSE class 10th board
That totally depends on what you are aiming for. The replacement of marks of additional subjects and the main subject is not like you will get the marks of IT on your Hindi section. It runs like when you calculate your total percentage you have got, you can replace your lowest marks of the main subjects from the marks of the additional subject since CBSE schools goes for the best five marks for the calculation of final percentage of the students.
However, for the admission procedures in different schools after 10th, it depends on the schools to consider the percentage of main five subjects or the best five subjects to admit the student in their schools.
i got less marks in maths can it get replaced by additional hindi in cbse
Replacement of marks of additional subjects and your main course subject is not like they will swap the marks you got in Hindi and Mathematics on your marksheet. It works like if you calculate the total percentage you got in your class, you can take the marks of your additional subject to consider in place of the subject you have got the least marks in. CBSE schools consider this method only to release the merit list of their students.
If you're in 10th and aiming to get admission in 11th in any school, it depends on the schools if they consider your main five subject marks or the best five subject marks for the admission.
If you're in 12th and are trying for different colleges to get in, it depends on your course which you wish to study further and also some criterias and eligibility of the colleges. In most cases for general courses, colleges take the best three or best four subjects marks consideration for the admission process.
So, good luck.
when will cbse term 2 result will declare please tale
Hello,
Central Board of Secondary Education will declare term 2 CBSE exam result 2022 for Class 10 in the third week of July. Please keep an eye on the official website or the link below for the latest information. Students need to enter their CBSE board roll number and other details to check term 2 cbseresults.nic.in 2022 Class 10 results. The board had announced the CBSE Class 10 results 2022 for term 1 on March 11, 2022.
cbse 10 claas bord result check now
Hello Aspirant,
Class 10 cbse results are not out yet. It is expected to be declared on 23rd of July. Keep checking the official website of cbse.
Good luck.