NEET 2019 Physics question

A hollow metal sphere of radius is uniformly charged. The electric field due to the sphere at a distance from the centre

(1)Increases as increases for and for
(2)Zero as increases for , decreases as increases for Correct
(3)Zero as increases for , increases as increases for
(4)Decreases as increases for and for

Answer: (2)

Solution

All the charge of a conducting hollow sphere resides on its outer surface. Inside (): by Gauss's law, , so for all (it stays zero as increases). Outside

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Question ID VK-092399