Electrostatic Potential, Class 12 Physics Sample Papers

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. A hollow metal sphere of radius 20 cm is charged such that the potential on its surface is 120 Volt. The potential at the centre of the sphere is

  80 V

 6 V

 120 V

 Zero

Question 1 of 20

2. The work done in moving a positive test charge qo from infinity to a point P at a distance r from the charge q is

 A

 B

 C

 D

Question 2 of 20

3. Electric field intensity is equal to

 time rate of change of potential

 minimum rate of change of potential with distance

 maximum rate of change of potential with distance

  none of the above

Question 3 of 20

4. Electric potential at a point located far away from the charge is taken to be

 Unity

 May be zero or infinite

  Zero

  Infinite

Question 4 of 20

5. A charge of 6 mC is located at the origin. The work done in taking a small charge of -2 x 10^-9 C from a point P (0, 3 cm, 0) to a Q (0,4 cm, 0) is

 0.5 J

 1.12 J

 1.2 J

 0.9 J

Question 5 of 20

6. A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at the centre of the sphere is

 0 V

 10 V

 same as at point 25 cm away from the surface

 same as at point 5 cm away from the surface

Question 6 of 20

7. It requires 4 J of work to move a charge of 20 C from point A to point B, separated by a distance of 0.2 cm. The potential difference between A and B in volts

 0.2

 16

  5

 80

Question 7 of 20

8. What is the direction of the lines of force at any point on the equipotential surface?

 Parallel to it

 Perpendicular to it.

 Inclined at 45 degrees

 None of the above

Question 8 of 20

9. A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 80 volt. The potential at the centre of the sphere is

 8 volt

  zero

 800 volt

  80 volt

Question 9 of 20

10. Electric field intensity at point ‘B’ due to a point charge ‘Q’ kept at a point ‘A’ is 12 NC^-1 and the electric potential at a point ‘B’ due to same charge is 6 JC^-1. The distance between AB is

  2 m

 1.5 m

 1 m

 0.5 m

Question 10 of 20

11. E=-dV/dr, here the negative sign signifies that

 E increases when V decreases

 E is directed in the direction of decreasing V

 E is negative

 E is opposite to V

Question 11 of 20

12. Work done in carrying 2C charge in a circular path of radius 2m around a charge of 10C is

  6.67J

 60J

 Zero

 15J

Question 12 of 20

13. Dimensional formula for potential difference is

 A

 B

 C

 D

Question 13 of 20

14. Whats motion?

 Motion

  Speed

 Force

 None

Question 14 of 20

15. If 100 J of work has to be done in moving an electric charge of 4C from a place where potential is -5 V to another place, where potential is V volt. The value of V is

 15 V

 20 V

 25 V

 10 V

Question 15 of 20

16. A particle of charge q₁ = is located on x-axis at the point x₁ = 6 cm. A second point charge q₂ =  is placed on the x-axis at x₂ = -4 cm. The absolute electric potential at the origin is

  9 x 10^-6 V

 9 x 10⁵ V

 9 x 10^-4 V

 9 x 10^-2 V

Question 16 of 20

17. Electric potential is

 scalar and dimensionless

 vector and dimensionless

 scalar with dimension

 vector with dimension

Question 17 of 20

18. The amount of work done in moving a unit positive charge through distance of 10 cm on an equipotential surface is

 100 joule

 10 cm

 1/10 cm

 Zero

Question 18 of 20

19. Equal charges are given to two spheres of different radii. The potential will

 be equal on both the spheres

 be more on the smaller sphere

 be more on the bigger sphere

 depend on the material of the sphere

Question 19 of 20

20. A hollow metal sphere of radius 5cm is charged so that the potential on its surface is 10V. The potential at a distance of 2cm from the centre of the sphere is

  4V

 zero

 10/3V

 10V

Question 20 of 20

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