Question

Two charges with a certain distance apart have an electrostatic force of 400 N acting

between them. If the same charges are separated to 4 times their original distance, what
will the new electrostatic force be between them?
A. 100 N
C. 50 N
E. 1600 N
B. 25 N
D. 400 N

Answer 1

As the charges’ distance increase, there is a weaker force of attraction between them hence the electrostatic force decreases as distance increases. It increase by 4 (times 4) so the force will decrease by 4 making the answer

=A (400 divided by 4 = 100)