1.

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. ZeroB. along diagonal `AC`C. along diagonal ` BD`D. perpendicular to the side ` AB`

Answer» 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`.


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