This is a test oooppps

Explanation:

First of all friend attach a picture with the question then only I can Solve

hope you might understood..

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.