Two point charges repel each other with a force of 100N. One of the charges is increased by 10%, and the other….

Q: Two point charges repel each other with a force of 100N. One of the charges is increased by 10%, and the other is reduced by 10%. The new force of repulsion at the same distance would be

(a) 100 N

(b) 121 N

(c) 99 N

(d) none of these

Ans: (c)