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Charges `+q` and `-q` are placed at points `A` and `B` respectively which are a distance `2L` apart, `C` is the midpoint between `A` and `B`. The work done in moving a charge `+Q` along the semicircle `CRD` is

A

`-(qQ)/(6pi in_(0)L)`

B

`(qQ)/(4pi in_(0)L)`

C

`(qQ)/(2pi in_(0)L)`

D

`(qQ)/(6pi in_(0)L)`

Text Solution

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The correct Answer is:
A
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