A semicirxular wire of radius a having `lambda`as charge per unit length Is shown in the figure. Find the electric potential at the centre of the semicircular wire.

Find the electric field at centre of semicircular ring shown in figure . .

Find the electric field at centre of semicircular ring shown in figure . .

Find the electric field at centre of semicircular ring shown in figure . .

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 semicircular are of radius a is charged uniformly and the charge per unit length is lambda . The electric field at its centre is

A semi-cricular arc of radius a is charged unformly and the charge per unit length is lambda . The electric field at the centre is

If linear charge density of a wire as shown in the figure is lambda

Two semicircular rings lying in same plane, of uniform linear charge density lambda have radius r and 2r. They are joined using two straight uniformly charged wires of linear charge density lambda and length r as shown in figure. The magnitude of electric field at common centre of semi circular rings is -

Two semicircular rings lying in same plane, of uniform linear charge density lambda have radius r and 2r. They are joined using two straight uniformly charged wires of linear charge density lambda and length r as shown in figure. The magnitude of electric field at common centre of semi circular rings is -