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

A ring of radius 3 m has charge density lambda . Electric potential at 4 m from its centre on its axis is ____ [k=(1)/(4pi epsilon_(0))]

A ring of radius 3 m has charge density lambda . Electric potential at 4 m from its centre on its axis is ____ [k=(1)/(4pi epsilon_(0))]

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

A quarter ring of radius R is having uniform charge density lambda . Find the electric field and potential at the centre of the ring.

A ring of radius R having a linear charge density lambda moves towards a solid imaginary sphere of radius (R)/(2) , so that the centre of ring passes through the centre of sphere. The axis of the ring is perpendicular to the line joining the centres of the ring and the sphere. The maximum flux through the sphere in this process is

A ring of radius R having a linear charge density lambda moves towards a solid imaginary sphere of radius (R)/(2) , so that the centre of ring passes through the centre of sphere. The axis of the ring is perpendicular to the line joining the centres of the ring and the sphere. The maximum flux through the sphere in this process is

A charge Q is distributed uniformly on a ring of radius R as shown in the following diagrams. Find the electric potential at the centre O of the ring