Question

Two equal and opposite point charges each of one coulomb are placed at a distance of one metre from each other. The potential at a point midway between the two point charges will be ..?

Answer 1

V=0 where V is the potential

Answer 2

Explanation:

It is given that, there are two equal and opposite charges of 1 coulomb are placed at a distance of 1 meter from each other.

We need to find the potential at a point midway between the two point charges. The electric potential is given by :

$V=\dfrac{kq}{r}$

Potential due to first charge, $V_1=\dfrac{k(1)}{1}$

Potential due to second charge, $V_2=\dfrac{k(-1)}{1}$

So, total potential at a point midway between the charges is given by :

$V=V_1+V_2$

$V=\dfrac{k(1)}{1}+\dfrac{k(-1)}{1}$

V = 0

So, the electric potential at a point midway between the charges is 0. Hence, this is the required solution.