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NCERT Exemplar Class 12 Physics solutions chapter 2 revolves around the charges, their electrostatic field along with potential and capacitance. NCERT Exemplar Class 12 Physics chapter 2 solutions deal with a variety of topics relating to the electrostatic field of a static charge, and the work is done in moving such charge from one point to another in the presence of the electrostatic field of one or other charge and the used electrostatic potential energy in doing so. Class 12 Physics NCERT Exemplar solutions chapter 2 also provides different questions for finding and understanding the potential due to a number of charges as well as electric dipole and also establishes the relationship between the electrostatic field and potential. Students preparing for Class 12 examinations must make use of NCERT Exemplar Class 12 Physics solutions chapter 2 PDF download that have been prepared by experts. These solutions help the students in better understanding of concepts of NCERT and the best way to solve and answer the questions.
Also check - NCERT Solutions for Class 12 Physics
Question:2
A positively charged particle is released from rest in a uniform electric field. The electric potential energy of the charge
a) remains a constant because the electric field is uniform
b) increases because the charge moves along the electric field
c) decreases because the charge moves along the electric field
d) decreases because the charge moves opposite to the electric field
Answer:
The answer is the option (c) decreases because the charge moves along the electric fieldQuestion:3
Figure shows some equipotential lines distributed in space. A charged object is moved from point A to point B.
a) the work is done in fig (ii) is the least
b) the work is done in fig (i) is the greatest
c) the work is done in fig (iii) is greater than fig (ii) but equal to that in fig (i)
d) the work done is the same in fig (i), fig (ii), and fig (iii)
Answer:
The answer is the option (d) the work done is the same in fig (i), fig (ii), and fig (iii).Question:4
The electrostatic potential on the surface of a charged conducting sphere is 100V. Two statements are made in this regard:
S1: At any point inside the sphere, the electric intensity is zero
S2: At any point inside the sphere, the electrostatic potential is 100V
Which of the following is a correct statement?
a) S1 and S2, both are false
b) S1 is true, S2 is false
c) S1 and S2, both are true but each of the statements is independent
d) S1 and S2, both are true and S1 is the cause of S2
Answer:
The answer is the option (d) S1 and S2, both are true, and S1 is the cause of S2Question:5
Equipotential at a great distance from a collection of charges whose total sum is not zero are approximately
a) Ellipsoids
b) Spheres
c) Paraboloids
d) planes
Answer:
The correct answer is (b) spheresQuestion:7
Consider a uniform electric field in the direction. The potential is a constant
a) in all space
b) on the x-y plane for a given z
c) for any y for a given z
d) for any x for a given z
Answer:
The electric field in z-direction implies that equipotential surfaces are in x-y plane.Question:8
Equipotential surfaces
a) will always be equally spaced
b) are closer in regions of large electric fields compared to regions of lower electric fields
c) will be more crowded near regions of large charge densities
d) will be more crowded near sharp edges of a conductor
Answer:
The answer is the options,Question:9
The work is done to move a charge along an equipotential from A to B
a) is zero
b) cannot be defined as
c) must be defined as
d) can have a non-zero value
Answer:
The answer is the optionsQuestion:10
In a region of constant potential
a) the electric field shall necessarily change if a charge is placed outside the region
b) The uniform electric field will be there
c) in the inside region, there can be no charge
d) zero electric fields will be there
Answer:
The correct answers are the options,Question:11
In the circuit shown in the figure, initially key is closed and is open. Then is opened and is closed. Then
a) charge on gets redistributed i.e,
b) charge on gets redistributed i.e,
c) charge on gets redistributed such that
d) charge on gets redistributed such that
Answer:
The answer is the options,Question:12
If a conductor has a potential and there are no charges anywhere else outside, then
a) the charges must on the surface or inside itself
b) no charge will be in the body of the conductor
c) the charges must be only on the surface
d) the charges must be inside the surface
Answer:
The answer is the options,Question:13
A parallel plate capacitor is connected to a battery as shown in the figure. Consider two situations:
A: Key K is kept closed and plates of capacitors are moved apart using the insulating handle
B: Key K is opened, and plates of capacitors are moved apart using the insulating handle
Choose the correct options
a) In A: V remains the same and hence Q changes
b) In A: Q remains the same but C changes
c) In B: Q remains the same and hence V changes
d) In B: V remains the same but C changes
Answer:
The answer is the options,Question:15
Do free electrons travel to a region of higher potential or lower potential?
Answer:
We know that the charged particle in the electric field has a force, that can be expressed asQuestion:16
Can there be a potential difference between two adjacent conductors carrying the same charge?
Answer:
Yes, it is possible and there may be a potential difference between two same charges carrying adjacent conductors. This is because the sizes of the conductors might be differentQuestion:17
Can the potential function have a maximum or minimum in free space?
Answer:
Because the atmosphere around the conductor that prevents the electric discharge is absent, therefore, the potential function cannot be maximum or minimum in free space.Question:19
Answer:
In a closed equipotential surface, the potential changes from position to position.Question:21
Answer:
The electric potential will decrease in the direction of the electric field. The potentialQuestion:22
Answer:
Question:24
Answer:
We know, the equation of the equipotential for an infinite cylinder of radius with linear charge density is:
Question:26
Answer:
Here, the capacitors are connected in parallel. Therefore, the voltage across the capacitors is the same. Let us assume the final voltage is U. Here, C is the capacitance of the capacitor without the dielectric. At this point, the charge isQuestion:27
Answer:
The thin conducting disc of radius r and thickness t is placed at the center of the bottom plate. Therefore, the potential of that thin disc is equal to the potential of that plate.
Hence, the electric field E on the disc will be
Therefore, the charge transferred to the disc
Therefore, the force acting on the disc,
Therefore,
Question:29
Answer:
Let us say, the charge stored on the first and second metal spheres before contact is and respectively.Question:31
Answer:
Question:32
Answer:
Question:33
Answer:
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The students will be able to understand the concept of electric potential and how it is produced by a single charge, different charges, and also by electric dipole and also establishes its relationship between such potential and electric field. They will also learn about the charge storing device known as a capacitor, its working, how they are used in various devices present around us, its capacitance, and also about different types of dielectrics and their polarization. Class 12 Physics NCERT Exemplar solutions chapter 2 also gives students an insight towards the working of Van De Graff Generators which are used in laboratories for experimentation purposes.
Here are the important topics that the students must specifically learn in Class 12 Physics chapter 2 Electrostatic Potential and Capacitance:
· The students will get to learn about equipotential surfaces, and the changes in potential energy of charges in different kinds of the external field with other charges present. The chapter also provides a complete representation of electrostatic fields around any conductor along with the concept of electrostatic shielding.
· NCERT Exemplar solutions for Class 12 Physics chapter 2 tells about capacitors, its making and how their capacitance can be affected due to change in the geographical configuration of capacitors along with the explanation for the parallel plate capacitor.
· NCERT exemplar Class 12 Physics chapter 2 solutions also includes questions related to the effect of dielectric on the capacitor and the total capacitance when various different capacitors are arranged in series and parallel and the energy stored in it and Van De Graff Generator
Also read NCERT Solution subject wise
Must read NCERT Notes subject wise
Also Check NCERT Books and NCERT Syllabus here:
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All these questions given in the chapter are solved exhaustively, with proper explanation, steps, diagrams and conclusion.
In all 33 questions from main exercise is solved in detail in the NCERT exemplar Class 12 Physics solutions chapter 2 Electrostatic Potential and Capacitance
Our very own highly experienced teachers of physics have solved these questions as per the CBSE pattern
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hello,
Yes you can appear for the compartment paper again since CBSE gives three chances to a candidate to clear his/her exams so you still have two more attempts. However, you can appear for your improvement paper for all subjects but you cannot appear for the ones in which you have failed.
I hope this was helpful!
Good Luck
Hello dear,
If you was not able to clear 1st compartment and now you giving second compartment so YES, you can go for your improvement exam next year but if a student receives an improvement, they are given the opportunity to retake the boards as a private candidate the following year, but there are some requirements. First, the student must pass all of their subjects; if they received a compartment in any subject, they must then pass the compartment exam before being eligible for the improvement.
As you can registered yourself as private candidate for giving your improvement exam of 12 standard CBSE(Central Board of Secondary Education).For that you have to wait for a whole year which is bit difficult for you.
Positive side of waiting for whole year is you have a whole year to preparing yourself for your examination. You have no distraction or something which may causes your failure in the exams. In whole year you have to stay focused on your 12 standard examination for doing well in it. By this you get a highest marks as a comparison of others.
Believe in Yourself! You can make anything happen
All the very best.
Hello Student,
I appreciate your Interest in education. See the improvement is not restricted to one subject or multiple subjects and we cannot say if improvement in one subject in one year leads to improvement in more subjects in coming year.
You just need to have a revision of all subjects what you have completed in the school. have a revision and practice of subjects and concepts helps you better.
All the best.
Hi,
You just need to give the exams for the concerned two subjects in which you have got RT. There is no need to give exam for all of your subjects, you can just fill the form for the two subjects only.
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