Q.
A spherical conductor of radius 10cm has a charge of $3.2 \times 10^{-7} C$ distributed uniformly. What is the magnitude of electric field at a point $15\,cm$ from the centre of the sphere ?
$(\frac {1}{4\pi \epsilon_o} = 9 \times 10^9 Nm^2/C^2)$
Solution: