Find the electric field at the origin due to the line charge (ABCD) of linear charge density `lambda`,

The electric field at distance .r. from infinte line of charge ("having linear charge density" lambda) is

Find the electric field at point O, due to the segment of a ring, whose linear charge density is 8 C //cm

The dimensional formula of linear charge density lambda is

The dimensional formula of linear charge density lambda is

Obtain the expression of electric field by a straight wire of infinite length and with linear charge density lambda .

Use Gauss' law to derive the expression for the electric field due to straight uniformally charged infinite line of charge density lambda cm^-1 .