1.

A hollow metallic sphere of radius R is given a charge Q. Then the potential at the centre is          [Orissa JEE 2005]

A.            Zero                                         
B.            \[\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{Q}{R}\]
C.                    \[\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{2Q}{R}\]
D.                                              \[\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{Q}{2R}\]
Answer» C.                    \[\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{2Q}{R}\]


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