The Class 12 Physics MCQ Questions with Answers can be easily accessible on Sarthaks eConnect. Students Class 12 Physics MCQ Questions of Electrostatic Potential and Capacitance with Answers provide here. Further, the MCQ Questions for Class 12 Electrostatic Potential and Capacitance with Answers provided here can be used by students to understand the concepts discussed in the chapter in detail. Scoring good marks in class 12 board exams is extremely important for every student.
These Important Questions with Answers are created by individual subject experts according to the latest CBSE guidelines. These MCQ Questions can be used by students to understand the concepts discussed in the chapter in detail. So, they can make a quick revision of all the important topics and MCQ Questions with Answers confident the board exams.
Practice MCQ Question for Class 12 Physics chapter-wise
1. If a conductor has a potential V ≠ 0 and there are no charges anywhere else outside, then
(a) there must be charges on the surface or in¬side itself
(b) there cannot be any charge in the body of the conductor
(c) there must be charges only on the surface
(d) both (a) and (b) are correct
2. A parallel plate air capacitor is charged to a potential difference of V volts. After disconnecting the charging battery the distance between the plates of the capacitor is increased using an insulating handle. As a result the potential difference between the plates
(a) increases
(b) decreases
(c) does not change
(d) becomes zero
3. Two identical capacitors are joined in parallel, charged to a potential V, separated and then connected in series, the positive plate of one is connected to the negative of the other. Which of the following is true?
(a) The charges on the free plated connected together are destroyed.
(b) The energy stored in ths system increases
(c) The potential difference between the free plates is 2V
(d) The potential difference remains constant
4. Two spherical conductors each of capacity C are charged to potential V and -V. These are then connected by means of a fine wire. The loss of energy is
(a) zero
(b) 1/2 CV2
(c) CV2
(d) 2 CV2
5. Two copper spheres of the same radius, one solid and the other hollow, are charged to the same potential. Which will have more charge?
(a) Solid sphere
(b) Hollow sphere
(c) Both will have an equal charge
(d) None of these
6. A bird sitting on a high power line:
(a) gets killed instantly
(b) gets a mild shock
(c) gets a fatal shock
(d) is not affected practically
7. Choose the SI unit of electric potential energy :
(a) Joule
(b) Coulomb
(c) Netwon per coulomb
(d) Erg
8. When a dielectric slab is introduced between the plates of a parallel plate capacitor which remains connected to a battery then charge on the plates relative to earlier charge is :
(a) more
(b) less
(c) less or may be more
(d) same
9. The electric potential of earth is taken as:
(a) zero
(b) infinity
(c) unity
(d) None of these
10. A positively charged particle is released from rest in an 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
11. Equipotentials at a great distance from a collection of charges whose total sum is not zero are approximately
(a) spheres
(b) planes
(c) paraboloids
(d) ellipsoids
12. The electric potential inside a conducting sphere
(a) increases from centre to surface
(b) decreases from centre to surface
(c) remains constant from centre to surface
(d) is zero at every point inside
13. It becomes possible to define potential at a point in an electric field because electric field
(a) is a conservative field
(b) is a non-conservative field
(c) is a vector field
(d) obeys principle of superposition
14. There are two metallic spheres of same radii but one is solid and the other is hollow, then
(a) solid sphere can be given more charge
(b) hollow sphere can be given more charge
(c) they can be charged equally (maximum)
(d) None of the above
15. The positive terminal of 12 V battery is connected to the ground. Then the negative terminal will be at
(a) – 6 V
(b) + 12 V
(c) zero
(d) – 12 V
16. A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at a distance of 2 cm from the centre of the sphere is
(a) zero
(b) 10 V
(c) 4 V
(d) 10/3 V
17. Energy is stored in a capacitor in the form of
(a) electrostatic energy
(b) magnetic energy
(c) light energy
(d) heat energy
18. In a charged capacitor, the energy is stored in
(a) the negative charges
(b) the positive charges
(c) the field between the plates
(d) both (a) and (b)
19. Capacitors are used in electrical circuits where appliances need more
(a) voltage
(b) current
(c) resistance
(d) power
20. Assertion : Electric field is discontinuous across the surface of a spherical charged shell.
Reason : Electric potential is continuous across the surface of a spherical charged shell
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct
21. A table tennis ball that has been covered with conducting paint is suspended by a silk thread so that it hangs between two plates, out of which one is earthed and other is connected to a high voltage generator. This ball
(a) Is attracted towards high voltage plate and stays there
(b) Hangs without moving
(c) Swing backward and forward hitting each plate in turn
(d) Is attracted to the earthed plate and stays there
22. If a unit positive charge is taken from one point to another over an equipotential surface, then-
(a) Work is done on the charge
(b) Work is done by the charge
(c) Work done is constant
(d) No work is done
23. When one electron is taken towards the other electron, then the electric potential energy of the system -
(a) Decreases
(b) Increases
(c) Remains unchanged
(d) Becomes zero
24. Equipotential surfaces associated with an electric field which is increasing in magnitude along the x-direction are
(a) Planes parallel to yz-plane
(b) Planes parallel to xy-plane
(c) Planes parallel to xz-plane
(d) Coaxial cylinders of increasing radii around the x-axis
25. If the dielectric constant and dielectric strength be denoted by k and x respectively, then a material suitable for use as a dielectric in a capacitor must have
(a) High k and high x
(b) High k and low x
(c) Low k and low x
(d) Low k and high x