Three charges, each +q, are placed at th...

Three charges, each `+q`, are placed at the corners of an isosceles triangle ABC of sides 'BC and AC, 2a. D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is

A

`(qQ)/(8piepsilon_0a)`

B

`(qQ)/(4piepsilon_0a)`

C

zero

D

`(3qQ)/(4piepsilon_0a)`

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The correct Answer is:

A

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