Question

Calculate the electric potential at the centr C of a square of side 'a' having charges,q,-q,q,-q placed at each of the corners.​

Answer 1

Explanation:

the potential at the center will be zero as it is a scalar quantity.

potential is given by kq/r

for a square the distance from each charge to the center is same so net potential is

net V=kq/r+kq/r+k(-q)/r+k(-q)/r

net V=0