Free Printable Law of Electric Charges

Worksheets

Law of Electric Charges

Total questions: 18

Worksheet time: 18mins

Name

Class

Date

The law, governing the force between electric charges is known as

Ampere's law

Ohm's law

Coulomb's law

Faraday's law

The ratio of the forces between two small spheres with constant charge (a) in air (b) in a medium of dielectric constant K is

1 : K

K : 1

1 : K²

K ²: 1

+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

4 N (Attractive)

4 N (Repulsive)

8 N (Repulsive)

zero

When $10^{14}$ electrons are removed from a neutral metal sphere, the charge on the sphere becomes

16 $\mu$ C

- 16 $\mu$ C

32 $\mu$ C

- 32 $\mu$ C

Two charges of equal magnitudes and at a distance r exert a force F on each other. If the charges are halved and distance between them is doubled, then the new force acting on each charge is

F / 8

F / 4

F/16

Six charges, three positive and three negative of equal magnitude are to be placed at the vertices of a regular hexagon such that the electric force on a test charge at O is double the electric force when only one positive charge of same magnitude is placed at R. Which of the following arrangements of charges is possible for P, Q, R, S, T and U respectively

+ , - , +, - , - , +

+ , - , + , - , + , -

+ , + , - , + , - , -

-, + , + , - , + , -

Tick the incorrect option.

Electrostatic force is a conservative in nature.

Two identical metallic spheres of exactly equal masses are taken. One is given a positive charge Q Coulombs and the other an equal negative charge. Their masses after charging are different.

The electric force between two charges changes, if we bring a third charge closer to them.

Electrostatic force is both attractive and repulsive.