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A charge (-q) and another charge (Q) are...

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

A

`(1)/(4pi epsilon_(0)) (Qq)/(l)`

B

`(1)/(4pi epsilon_(0)) (Qq)/(l^(2))`

C

`(1)/(4pi epsilon_(0))Qql`

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
D
According to figure, potential at `A and C` are equal. Hence work done in moving `-q` charge from A to C is zero.
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