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A solid conducting sphere of radius a has a net positive charge 2Q. A conducting spherical shell of inner radius b and outer radius c is concentric with the solid sphere and has a net charge– Q.The surface charge density on the inner and outer surfaces of the spherical shell will be

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A solid conducting sphere of radius a has a net positive charge 2Q. A conducting spherical shell of inner radius b and outer radius c is concentric with the solid sphere and has a net charge– Q.The surface charge density on the inner and outer surfaces of the spherical shell will be respectively
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Options:
(a) `-(2Q)/(4pib^2),Q/(4pic^2)` (b) `-Q/(4pib^2),Q/(4pic^2)`
(c) `0,Q/(4pic^2)` (d) `Q/(4pic^2),0`

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