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Question
A solid sphere of radius R has a charge Q distributed in its volume with a charge density ρ = kra, where k and a are constants and r is the distance from its centre. If the electric field at r = `"R"/2` is `1/8` times that at r = R, the value of a is ______.
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2
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Solution
A solid sphere of radius R has a charge Q distributed in its volume with a charge density ρ = kra, where k and a are constants and r is the distance from its centre. If the electric field at r = `"R"/2` is `1/8` times that at r = R, the value of a is 2.
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Electric Field Due to a Point Charge
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