Four point charge of `+10^(-7)C, -10^(-7)C, -2xx10^(-7)C` and `+2 xx 10^(-7)C` are placed respectively at the corners A, B, C, D of a 0.05m square. Find the magnitude of the resultant force on the charge at D. 

Options

A. 0.2 dyne
B. 0.2 newton
C. 2 dyne
D. 0.02 newton

Answer

B