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Question

The potential variation with distance for a uniformly charged ring having radius R and carrying charge Q is:

A
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B
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C
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D
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Solution

The correct option is C
For a ring

VP=kQR2+x2,Vcentre=kQR,As x,V0.

So potential is maximum at the centre and then decreases as

VP1R2+x2


So option (c) is correct.


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