The electric potential at the center of a square of side 40 cm is 4.0 V when a charge +Q is located at one of the square's corners. When a charge -Q is placed at the opposite corner, the electric potential at the square's center is

Question

Quizplus · Accepted Answer

The electric potential due to a point charge is a scalar quantity, which means it can be added algebraically. When a positive charge +Q is at one corner, it creates a potential of 4.0 V at the center. Adding a negative charge -Q at the opposite corner would create an equal but negative potential at the center, effectively canceling out the potential from the positive charge. Therefore, the net electric potential at the center of the square becomes 0.0 V.

The Electric Potential at the Center of a Square of Side