Question

Four chrages `2C, -3C, -4C` and `5C` respectively are placed at all the corners of a square. Which of the following statements is true for the point of intersection of the diagonals ?
A. Electric fields is zero but electric potential is non-zero
B. Electric fields is non-zero but electric potential is zero
C. Both electirc field and electirc potential is zero
D. Neither electric fields nor electric potential is zero.

Answer 1

Correct Answer - B
`V = 9 xx 10^(9) [(2)/(r ) -(3)/(r ) - (4)/(r ) - (5)/(r )] = 0`
Electric fields due to all the charges shell not cancel out because of different direction.