Let `P(r)=(Q)/(piR^4)r` 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 `r_1` from the centre of the sphere, the magnitude of electric field is:

Options

A. `Q/(4pi epsi_(0) r_(1)^(2))`
B. `(Qr_(1)^(2))/(4pi epsi_(0) R^(4))`
C. `(Qr_(1)^(2))/(3 pi epsi_(0) R^(4))`
D. `0`

Answer

B