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

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 charge of 500 muC is distributed uniformly over the circumference of a ring of radius 25 cm. What will be be electric potential at the centre of ring?

A charge is distributed uniformly over a ring of radius r. obtain an expression for the electric intensity vecE at a point on the axis of the ring. Hence show that for points at large distances, the ring behaves as a point charge.

A charge is distributed uniformly over a ring of radius ‘a’. Obtain an expression for the electric intensity E at a point on the axis of the ring. Hence show that for points at large distances from the ring, it behaves like a point charge.

A charge Q is uniformly on a ring of radius R . Find the electric potential on the axis of ring at distance x from the centre of the ring. Sketch variation of potential with respect to x .

A Charge Q is distributed uniformly on a ring of radius r. A sphere of equal r is constructed with its centre at the periphery of the ring (figure 30.12) Find the flux of the electric field through the surface of the sphere.

A charge Q is distribution over a metal sphere of radius R. What is the electric field and electric potential at the centre ?

[" A charge "Q" is distributed "],[" uniformly on a ring of radius "],[" r.A sphere of equal radius "r],[" is constructed with its centre "],[" at the periphery of the ring."],[" The flux of the electric field "],[" through the surface of the "],[" sphere is "(Q)/(n varepsilon_(0))" .The value of "n],[" is : "]