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Questions  >>  CBSE XII  >>  Math  >>  Model Papers
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A conductor with a cavity in it is given a charge Q. What will be the total charge on the surface of this conductor if another carrying charge q is placed in the cavity without touching the cavity ?

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Answer :
The charge on the surface will be $(Q+q)$ when the charge q is placed in the cavity equal and opposite charge (-q) is included at the inner surface of the cavity and therefore equal charge $+q$ is transferred to the other surface .
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