Four charges of +10.0 µC are placed at the four corners of a square that is 50.0 cm on each side. What is the magnitude of the electric field at the centre of the square?
A)2.9 N/C
B)2.1 N/C
C)0.7 N/C
D)0 N/C

Question

Quizplus · Accepted Answer

The electric field at the center due to each charge will be directed along the lines joining the center and the charges. Since the square is symmetric, the fields due to opposite charges will cancel each other out, resulting in a net electric field of 0 N/C at the center.

Four Charges of +10