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JEE Main 2015 Physics question

PhysicsElectrostatic Potential and CapacitanceJEE Main 2015

A uniformly charged solid sphere of radius R has potential (measured with respect to ∞) on its surface. For this sphere the equipotential surfaces with potential , , and have radius , , and respectively. Then Note : This question had two option correct at the time of examination. Proper corrections are made in the question to avoid it.

Answer: (4)

Solution

Inside the sphere and outside . The maximum potential is at the centre, so . For : $

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Question ID VK-115148