A spherical shell of radius R has a charge +q units. The electric field due to the shell at a point

Options

A. inside is zero and varies as `r^(-1)` outside it
B. inside is constant and varies as `r^(-2)`
C. inside is zero and varies as `r^(-2)` outside it
D. inside is constant and varies as `r^(-1)` outside it

Answer

C