Let’s think that we want to calculate the electric field intensity at point p caused by charge q at some point O.
So, OP=r. Lets suppose a test charge having positive charge is present at point P. If we apply the coulombs law of forces on it then the equation formed will be:
Where
is the unit vector from charge q towards charge
As
Therefore
—— 2.3
The below are vectors which are showing the electric field around a positive charge.
