A solid sphere of radius 4R is charged with volume charge density as p r kra here k and a are positive constant r is the

Question

A solid sphere of radius 4R is charged with volume charge density as p r kra here k and a are positive constant r is the distance from the centre If electric field at r R is 1 2 times the electric field at r 2R then find the value of a Answer 0 1 809 2 3 4 5 6 7

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