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

Question

Quizplus · Accepted Answer

The electric field at the center of the square due to four equal charges placed at each corner will be zero because the fields due to each charge will cancel out due to symmetry. Each charge will produce an electric field that points directly away from or towards the center, and with four charges, these fields will cancel out in pairs.

Imagine a Single Charge Q Placed on One Corner of a Square