Question

The electric field and the electric potential at a point are E and V respectively

Answer 1

The Electric Potential at any point P at a distance of r from any charge q is given by
$V = \frac{1}{4 \pi e} \frac{-q}{r}$
and Electric Field is given by
$E = \frac{1}{4 \pi e} \frac{q}{r^2}$
Also,
Electric field can also be expressed as,
$E = \frac{-dV}{dr}$