how much charge should be given to a spherical conductor of radius 0.1 m so that the electric field at the surface of the conductor is 900neuton coulamb-1
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Answer: You probably meant to type 900 N/C.
Because of the symmetry of your problem, it reduces to asking:
What amount of charge Q will produce an electric field of 900 V/m at a distance of 0.1 meters?
E = kQ/r^2
(N/C and V/m are identical units)
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