When a single charge q is placed on one corner of a square, the electric field at the center of the square is F/q. If three other equal charges are placed on the other corners, the electric field at the center of the square due to these four equal charges is
A) F/q.
B) F/(2q).
C) F/(4q).
D) 4F/q.
E) None of the above choices are correct.

Question

Quizplus · Accepted Answer

When four equal charges are placed at the corners of a square, the electric field at the center due to each charge will point directly away from that charge. Since the square is symmetrical, the fields due to the charges will cancel each other out, resulting in a net electric field of zero at the center.

When a Single Charge Q Is Placed on One Corner