A space charge of density `rho` is uniformly distributed in an infinitely long cylinder of radius R Then, for any point at distance r from the axis (relative permittivity = 1)

Options

A. the electric field is `E=(rhor)/(2 in_0)` for 0 lt r lt R
B. the electric field is `E=(rhoR^3)/(2in_0r^2)` for r gt R
C. the electric field is `E=(rhor)/in_0` for 0 lt r lt R
D. the electric field is `E=(rhoR^2)/(in_0r)` for r gt R

Answer

A