Electrostatics and Current Electricity Test Online MCQs

1. A positively charged rod is brought near an uncharged conductor. If the rod is then suddenly withdrawn the charge left on the conductor will be:

2. A charge is moved against electric repulsion in an electric field. Which of the following is correct?

3. Electric lines of force about a +ve point charge are:

4. Two charges are placed a certain distance apart. A metallic sheet is placed between them. What will happen to the force between the charges?

5. Electric intensity is equal to:

6. A cubical Gaussian surfaces encloses 30 C of charge. The electric flux through each surface of the cube is:

7. A positively charged glass rod is brought near the disc of uncharged gold leaf electroscope. The leaves diverge. Which one of the following statement is correct?

8. What is the electric potential at a center of a charged shell of radius 0.1 m if the potential at its surface is 10 V?

9. Where is the electric potential due to a charged shell constant?

10. Two balls carrying charges + 8 µ C and – 5 µ C attract each other with a force F. If a charge – 3 µ C  is added to both, the force between the balls will be:

11. The potential of a spherical conductor of radius 3 m is 6 V. The potential at its center is:

12. The work done in displacing a charge of 2 C through 0.5 m on an equipotential surface is:

13. Electric potential V due to a dipole is related to the distance r of the observation point as:

14. Conductivity of a conductor depends upon:

15. A charge of 5 C is placed at the center of a spherical Gaussian surface of radius 5 cm. The electric flux through the surface is:

16. Maximum value of current intensity due to a charged sphere is at:

17. Electric potential is:

18. Where does the electric potential due to a charge conducting shell vary inversely as the dis tanve from its centre?

19. Work done in carrying 2 C charge in a circular path of radius 3 m around a charge of 10 C is:

20. For an irregularly shaped charged conductor, the potential is: