If a charge −150nC is given to a concentric spherical shell and a charge +50nC is placed at its centre, then the charge on inner and outer surface of the shell is
A
50nC,100nC
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B
−50nC,−100nC
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C
50nC,200nC
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D
−50nC,−200nC
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Solution
The correct option is D−50nC,−100nC The charge +50nC at the centre induces −50nC on inner surface and +50nC on outer surface of the spherical sheet. So, charge on the inner surface =−50nC and charge on the outer surface =−150nC+50nC =−100nC.