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MHT CET Physics question

PhysicsElectric Charges and FieldsMHT CET

The number of electrons to be put on a spherical conductor of radius 0.1 m to produce an electric field of 0.036 N/C just above its surface is

Answer: (C)

Solution

gives \dfrac{ER^2}{ke}\dfrac{0.036×0.01}{9×10^9×1.6×10^{-19}}$=2

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Question ID VK-075700