A solid sphere of radius R has a charge Q distributed in its volume with a charge density rho = kr^(a) 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, find the value of a.

A solid sphere of radius R has a charge Q distributed in its volume wi

1.	A solid sphere of radius R has a charge Q distributed in its volume with a charge density rho = kr^(a) 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, find the value of a.
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A solid sphere of radius R has a charge Q distributed in its volume with a charge density rho = kr^(a) 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, find the value of a.

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