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प्रश्न
A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 5 V. What is the potential at the centre of the sphere?
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उत्तर
We know
`E =-(dv)/(dr)`and for hollow shell electric field at center = 0
`=> -(dv)/(dr) =0=> dv =0`
Hence Vc = 5V
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