Four charges , all of the same magnitude , are placed at the four corners of a square . At the centre of the square , the potential is `V` and the field is `E`. By suitable choice of the signs of the four charges ,which of the following can be obtained? (i) `V = 0 , E = 0` (ii) `V = 0 , E != 0` (iii) `V != 0 , E = 0` (iv) `V != 0 , E != 0`A. `V=0,E=0`B. `V=0,E!=0`C. `V!=0,E=0`D. `V!=0,E!=0`

Four charges , all of the same magnitude , are placed at the four corn

1.	Four charges , all of the same magnitude , are placed at the four corners of a square . At the centre of the square , the potential is `V` and the field is `E`. By suitable choice of the signs of the four charges ,which of the following can be obtained? (i) `V = 0 , E = 0` (ii) `V = 0 , E != 0` (iii) `V != 0 , E = 0` (iv) `V != 0 , E != 0`A. `V=0,E=0`B. `V=0,E!=0`C. `V!=0,E=0`D. `V!=0,E!=0`
Answer» Correct Answer - B::D

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