**Electric Field Intensity Due To A Point Charge**

Suppose we have to calculate electric field intensity at any point P due to a point charge q at O, where OP= r.

Consider a small positive test charge q0> at P.

According to Coulomb’s law, force at P is

F = 1/4Пε_{o} qq0/r^{2} a_{r}

where a_{r} is unit vector directed from q towards q0.

As E = F/q0

Therefore by putting value of F in above equation, we get

E = 1/4Пε_{o} q/r^{2} a_{r Continue reading “Electric Field Intensity Due To A Point Charge”}