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The net work done by conservative forces...

The net work done by conservative forces in moving an electron of charge e and mass m from A to B along the circular path shown by figure very slowly, in the vertical plane in the field of charge Q is

A

`(2"Qe")/(r)`

B

2 mg r

C

`2"mgr"+(2"Qe")/(r)`

D

zero

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The correct Answer is:
B
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