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A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 25 V. The electric field at centre of sphere is :

$(A)\;50 v/m \\ (B)\;125 v/m \\ (C)\; 5 v/m \\ (D)\;0 $

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Electric field inside a hollow metal sphere is always 0.
Hence D is the correct answer.
answered Jan 3, 2014 by meena.p

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