MHT CET 2023 Physics question
A conducting sphere of radius 0.1 has uniform charge density on its surface. The electric field in free space at radial distance 0.2 from a point on the surface is ( = permittivity of free space)
Answer: (C)
Solution
Outside a charged conducting sphere the field is that of a point charge at the centre: with , giving . Here m, , and the point is m from the surface, so
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