(ii)A charge `+q` exerts a force of magnitude `-0.2`N on another change `-2q`. If they are separated by 25..0 cm, determine the value of q.

A charge q_1 exerts some force on a second charge q_2 . If third charge q_3 is brought near charge q_1 , the force of q_1 exerted on q_2

Two charges q_1 and q_2 repel each other with a force of 0.1 N . What will be the force exerted by q_1 on q_2 , when a third charge is placed near them?

A charged spherical conductor of radius R carries a charge + Q. A point test charge + q_0 is placed at a distance x from the surface of the sphere. The force experienced by the test change will be proportional to

Set up an arrangement of three point charges +q, +2q, and +2xq separated by equal finite distances so that electric potential energy of the system is zero. Find the value of x.

Two unlike charges of magnitude q are separated by a distance 4d. The potential at a point midway between them is

Two particles of equal mass m and charge q are placed at a distance of 16 cm. they do not experience any force. The value of q/m is

A small sphere of radius r_1 and charge q_1 is enclosed by a spherical shell of radius r_2 and charge q_2 Show that if q_1 is positive, charge will necessary flow from the sphere to the shell (when the two are connected by a wire) no matter what the charge q_2 on the shell is.