Two identical point charges are kept apart in vacuum and experience a force

PHYSICS · Multi-part · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two identical point charges

+q

are kept

r

apart in vacuum and experience a force

F

. Answer the following: (a) If one of the charges is changed to

-q

while the separation remains

r

, how will the force change in magnitude and in nature? (b) With both charges positive again, the separation is doubled to

2r

. How will the magnitude of the force now compare with

F