1.

Three concentric spherical metal shells A.B.C of radii a,b,c(c gt b gt a) have surfacecharge density +sigma, - sigma and +sigma respectively. The potential of the middle shell is (sigma)/(epsilon_(0)) times

Answer»

`((a^(2))/(B)-b+C)`
(a-b+c)
`((a^(2)-b^(2)+c^(2))/(c))`
`(a-b+(c^(2))/(b))`

ANSWER :A


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