Two current elements are placed a certain distance apart but not parallel to each other. Do they exert equal and opposite forces on each other?

Prove that two parallel current elements exert equal and opposite force on each other.

Two point charges placed at a certain distance r in air exert a force F on each other. Then the distance r at which these charges will exert the same force in a medium of dielectric constnat K is given by

Two identical balls having like charges and placed at a certain distance apart repel each other with a certain force. They are brought in contact and then moved apart to a distance equal to half their initial separation. The force of repulsion between them increases 4.5 times in comparision with the initial value. The ratio of the initial charges of the balls is

Two identical balls having like charges and placed at a certain distance apart repel each other with a certain force. They are brought in contact and then moved apart to a distance equal to half their initial separation. The force of repulsion between them increases 4.5 times in comparision with the initial value. The ratio of the initial charges of the balls is

If action and reaction are equal and opposite, why do they never cancel each other?

Can you think of two particles which do not exert gravitational force on each other?

Can you think of two particles which do not exert gravitational force on each other?

Can you think of two particles which do not exert gravitational force on each other?