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

A ring has radius 30cm and a charge of 2nC .The electric potential on the axis of the ring at a distance of 40cm from its centre will be

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 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 hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V . The potential at a distance of 2 cm from the centre of the sphere

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.....

A charge of 5 nC is uniformly distributed on a ring of radius 4 cm. Find the potential at the axis at a distance of 3 cm from the center.

A uniform disc of radius R is charged with a uniform surface charge density sigma . Find the electric potential due to the charges on the disc at a point on its edge. [(sigmaR)/(piin_(0))]

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:

A permanent magnent has the shape of a sufficiency thin disc magnetized along its axis. The radius of the disc is R = 1.0 cm . Evaluate the magnitude of a molecular current I' flowing along the rin of the disc, lying at a distance x = 10 cm from its centre, is equal to B = 30 muT .