Question

Define electric field intensity due to a point charge

Answer 1

Answer:

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:

given in the pic

Answer 2

Electric Field Intensity :

The electric field intensity of any point is defined as the force experienced by unit positive charge placed at that point.

$\large\tt\red{E=\frac{F}{q_0}}$

The SI unit of electric field intensity

$\large \tt\orange{NC^{-1}}$

Electric field at any equatorial point of a dipole

$\large \tt{}is \: \: \: \green {\vec{E}=\frac{1}{4\pi\:\varepsilon_0}\frac{\vec{p}}{(r^2+a^2)^\frac{3}{2}}}$

At the mid-point of the dipole, r=0 so ,

$\large \tt \purple{\vec{E}=\frac{1}{4\pi\:\varepsilon_0}\frac{\vec{p}}{a^3}}$