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Four point charges -Q, -q, 2q and 2Q are...

Four point charges `-Q, -q, 2q` and `2Q` are placed, one at each corner of the square. The relation between `Q` and `q` for which the potential at the centre of the square is zero is

A

`Q= -q`

B

`Q= (1)/(q)`

C

`Q= q`

D

`Q= (1)/(q)`

Text Solution

Verified by Experts

The correct Answer is:
A

`because` Distances from charges are equal so at centre
So `-Q -q+2q+2Q= 0 rArr q= -Q`
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