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A charge (-q)and anther charge (+Q) are ...

A charge (-q)and anther charge (+Q) are kept at two point A and B respectively, keeping the charge (+Q) fixed at B, the charge (-q)at A is moved to another points C,such that ABC forms an equilateral triangle of side l. The net work done in moving the charge(-q) is

A

`(1)/(4piepsi_(0))(Qq)/l`

B

`(1)/(4piepsi_(0))(Qq)/(l^(2))`

C

`(1)/(4piepsi_(0))Qql`

D

zero

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