Question

Consider two identical point charges located at points (0, 0) and (a, 0).

Is there a point on the line joining them at which the electric field is zero?

Answer 1

Let at `a/2`:

`E_1 = (Kq)/(a"/"2)^2`

`E_2 = (Kq)/(a"/"2)^2`

The net electric field at a/2:

E_net = E₁ - E₂

∵ E₁ = E₂

E_net = 0

at `a/2`

So `a/2` is a point where the electric field is zero.