Question

Two charges of equal magnitudes kept 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 ______.

Options

• `"F"/8`

• `"F"/4`

• 4F

• `"F"/16`

Answer 1

Two charges of equal magnitudes kept 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 `underline("F"/16)`.

Explanation:

F = `("k"*"Q"^2)/"r"^2`.

If Q is halved, r is doubled then F = `1/16` times.