A solid sphere of radius R has a charge Q distributed in its volume with a charge density
ρ = κra, where κ 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 with a charge density
ρ = κra, where κ 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.