Let ρ(r)= Qr/πR4 be the charge density distribution for a solid sphere of radius R and total charge Q.For a point 'P' inside the sphere at distance r1 from the centre of the sphere, the magnitude of electric field is ?
The Attempt at a Solution
Constructing a spherical gaussien surface on which point P lies,
where q is the charge enclosed by the gaussien surface.
I'm having trouble as I don't know how to find q. I know dq= ρdv and so q=∫ ρdV , but if I do substitute ρ in that integral , I don't know what to do with the dV.
Please give me a hint as to how to proceed.