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Class 12 Physics (Part I) Chapter 1 Electric Charges And Fields Quiz 2 (25 MCQs)

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1. Two positively charged masses are separated by a distance, r. Which statement best describes the gravitational and electrostatic forces between the two masses?
2. The electric field inside a spherical shell of uniform surface charge density is
3. If the charge of 1 C is placed at a distance of 1 m from another charge of the same magnitude in a vacuum, it experiences an electrical force repulsion of magnitude ..... N.
4. If two charges attract to each other, then which of the following is true?
5. Conduction electrons are almost uniformly distributed within a conducting plate. When placed in an electrostatic field, the electric field 'E' within the plate
6. Charge on a conducting metal sphere present at:-
7. The electric field surrounding a positively charged object is
8. What will be the value of electric field at the centre of the electric dipole:-
9. Electric flux is a vector quantity.
10. Electric field intensity due to a short dipole remains directly proportional to:(where, r $\rightarrow$ distance of a point from centre of dipole)
11. In a science fair, a demonstration of an electric field is shown using a set of lines of force which are:
12. +2C and-6C two charges are repelling each other with a force of 12N . If each charge is given-2C of charge, then the value of the force will be
13. A region of influence surrounding an object is best defined as:
14. The accumulation of excess electric charge on an object is called
15. Which of the following describes the direction of electric field lines around a negative charge?
16. Two oppositely charged particles are held in place near each other. When the particles are released, what will most likely happen?
17. If $\int_{ }^{ }$
18. A hollow sphere of the charge does not produce an electric field at any:
19. A glass rod acquires charge by rubbing it with silk cloth. The charge on glass rod is due to:
20. What happens to the electric field strength if the distance between two charges is doubled?
21. When distance increases, electrostatic force ..... ; we call this relationship ..... proportional
22. An electric dipole is in unstable equilibrium in the uniform electric field. The angle between its electric dipole moment and the electric field is (in degrees)
23. When two spheres having 2Q and-Q charge are placed at a certain distance, the force acting between them is F. Now they are connected by a conducting wire and again separated from each other. How much force will act between them if the separation now is the same as before?
24. Identify the one which is not a property of electric field lines .
25. The buildup of charges on an object is called
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