A solid conducting sphere having a charge Q is surrounded by an uncharged concentric conducting hollow spherical shell. Let the potential difference between the surface of the solid sphere and that of the outer surface of the hollow shell be V. If the shell is now given a charge of –$$3Q$$, the new potential difference between the same two surfaces is

Question

A solid conducting sphere having a charge Q is surrounded by an uncharged concentric conducting hollow spherical shell. Let the potential difference between the surface of the solid sphere and that of the outer surface of the hollow shell be V.  If the shell is now given a charge of –$$3Q$$, the new potential difference between the same two surfaces is

Infinity Learn · Accepted Answer

In case of a charged conducting sphereIf a and b are the radii of sphere and spherical shell respectively, then potential at their surface will be  and Now when the shell is given charge $$($$–$$3Q)$$, then the potential will be

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