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A small metallic sphere carrying charge +Q is located at the centre of a spherical cavity in a large uncharged metallic spherical shell. Write the charge on the inner and outer surface of the shell. Write the expression for the electric field at the point? |
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Answer» Solution :As shown in the adjoining CHARGE -Q is induced on the inner surface of the metallic shell and, in turn, a charge +QIS induced on the outer surface of the shell. The electric field at point `P_1` situated in the cavity at a distance r from the centre of charged small metallic sphere is ` oversetto E=(1)/(4 pi in _0) .(Q)/(r^(2)) hatr ` The field is solely due to charge +Q of small metallic sphere and there is no field due to CHARGES induced on the hollow metallic shell. 
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