JEE Main & Advanced
Sample Paper
JEE Main - Mock Test - 5
question_answer
A solid sphere of radius R has a charge Q distributed in its volume with a charge density \[\rho =\kappa {{r}^{a}}\],, 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, the value of a is ________.