Point charge of `3xx10^(-9)C` are situated at each of three corners of a square whose side is `15cm`. The magnitude and direction of electric field at the vacant corner of the square is

Options

A. 2296 V/m along the diagonal
B. 9622 V/m along the diagonal
C. 22.0 V/m along the diagonal
D. zero

Answer

A

Explanation

`E=E(sqrt(2)+1/2)E=1/(4 pi epsilon_(0)) q/(r^(2))`
r= length of the side