A uniformly charged insulating disc of radius 40cm has charge per unit area `4.0nC/m^2`. the electric potential on the axis of the disc at a distance 30cm from its centre will be nearly

Find the electric field caused by a disc of radius a with a uniform surfce charge density sigma (charge per unit area) at a point along the axis of the disc a distance x from its centre.

A non-conducting solid sphere of radius R is uniformly charged. The magnitude of the electric filed due to the sphere at a distance r from its centre

A ring of radius a contains a charge q distributed. uniformly ober its length. Find the electric field at a point. on the axis of the ring at a distance x from the centre.

A uniformly charged thin ring has radius 10.0 cm and total charge +12.0 nC . An electron is placed on the ring's axis a distance 25.0 cm from the centre of the ring and is constrained to stay on the axis of the ring. The electron is then released from rest, then (i) describe the subsequent motion of the electron (ii) find the speed of the electron when it reaches the centre of the ring.

The electric field intensity at a distance 20 cm from the centre of a uniformly charged non conducting solid sphere of radius 10 cm is E .Then what is the electric field intensity at a distance 5 cm from the centre it will be.....

If a charged spherical conductor of radius 5 cm has potential V at a point distant 5 cm its centre, then the potential at a point distant 30 cm from the centre will be

Electric charge Q is uniformly distributed around a thin ring of radius a. find the potential a point P on the axis of the ring at a distance x from the centre of the ring .

A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10V . The potential at the distance 3 cm from the centre of the sphere is:

At which distance along the centre axis of a uniformaly charged plastic disc of radius R is the magnitude of the electric field equal to one-half the magnitude of the field at the centre of the surface of the disc ?

For a uniformly charged ring of radius R, the electric field on its exis has the largest magnitude at a distance h from its centre. Then value of h is :