apply Gauss’ Law

Electric Field due to a Long Line Charge – formula derivation

A line charge is in the form of a thin charged wire of infinite length with a uniform linear charge density σ (charge per unit length). Let there be a charge +q on the wire. We have to calculate the electric field at a point P at a distance r. Draw a right circular cylinder […]

Electric Field due to a Point Charge – derivation of the formula

By Anupam M

Let us apply Gauss’ Law to calculate electric field due to a point charge.Draw a spherical surface of radius r with a point charge at the center of the sphere, as shown in Fig. 1 The electric field E is along the radial direction pointing away from the center and normal to the surface of […]