[" A half ring of radius 'r' has a linear charge density "],[(lambda)/(p varepsilon_(1))" then the value of "'p'" is "]

A half ring of radius r has a linear charge density lambda .The potential at the centre of the half ring is

A half ring of radius r has a linear charge density lambda .The potential at the centre of the half ring is

The dimensional formula of linear charge density lambda is

The dimensional formula of linear charge density lambda is

A thin non-conducting ring of radius R has a linear charge density lambda=lambda_(0) cos theta , where theta is measured as shown. The total electric dipole moment of the charge distribution is

Find the electric field due to an infinitely long cylindrical charge distribution of radius R and having linear charge density lambda at a distance half of the radius from its axis.

Find the electric field due to an infinitely long cylindrical charge distribution of radius R and having linear charge density lambda at a distance half of the radius from its axis.