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Three concentric spherical shells A, B a...

Three concentric spherical shells A, B and C having uniformly distributed total charges +Q, -2Q and +Q respectively are placed as shown. The potential at the centre will be -

A

`(-Q)/(4pi epsilon_(0)a)`

B

`(-Q)/(12pi epsilon_(0)a)`

C

`(Q)/(12pi epsilon_(0)a)`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
C
`V_("centre")=(KQ)/(a) +(K(-2Q))/(2a) +(KQ)/(3a)=(KQ)/(3a)`
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