Question

Four charges are arranged at the corners of a square ` ABCD`, as shown. The force on a =ve charge kept at the centre of the square is -

A. Zero
B. along diagonal `AC`
C. along diagonal ` BD`
D. perpendicular to the side ` AB`

Answer 1

Correct Answer - D
` vec E_A + vec E_C = ` will be along `OA`
` vec E_B + vec E_E = ` will be along ` OB`
` | vec E_A | vec E_C |= | vec E_B + _D|`
So`E_o` will be perpendicular to side ` AB`.