Question

Find the electric field midway between a 2 -μC point charge which are 2.5 m apart.

Answer 1

Given:

$q=2\:\rm \mu C=2*10^{-9}\: C$

$r=1.25\:\rm m$

The electric field of a point charge

$$E=k\frac{q}{r^2}=9*10^9*\frac{2*10^{-9}}{1.25^2}=11.5\:\rm V/m$$