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Two thin wire rings each having radius R...

Two thin wire rings each having radius R are placed at distance d apart with their axes coinciding. The charges on the two are `+Q` and `-Q`. The potential difference between the centre so the two rings is

A

`(qR)/(4pi epsilon_(0)d^(2))`

B

`(q)/(2pi epsilon_(0))[(1)/(R )-(1)/(sqrt(R^(2)+d^(2)))]`

C

zero

D

`(q)/(4piepsilon_(0))[(1)/(R )-(1)/(sqrt(R^(2)+d^(2)))]`

Text Solution

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The correct Answer is:
B
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