Calculate the magnetic field at distance `y` from the centre of the axis of a disc of radius `r` and unifrom surface charge density `sigma`, If the disc spins with angular velocity `omega` ?

The magnitude of the electric field on the surface of a sphere of a sphere of radius r having a unifrom surface charge density sigma is

A dielectric circular disc of radius R carries a uniform surface charge density sigma . If it rotates about its exis with angular velocity omega , the magnetic field at the cente of disc is :

Calculate gravitational field intensity at a distance x on the axis from centre of a uniform disc of mass M and radius R .

Find the potential varphi at the edge of a thin disc of radius R carrying the uniformly distributed charge with surface density sigma .

Calculate electric field at a point on axis, which at a distance x from centre of uniformly charged disc having surface charge density sigma and R which also contains a concentric hole of radius r.

A disc of radius R rotates at an angular velocity omega about the axis perpendicular to its surface and passing through its centre. If the disc has a uniform surface charge density sigma , find the magnetic induction on the axis of rotation at a distance x from the centre. (Given R=3m , x=4m and mu_(0)sigmaomega=20Tesla//m .)

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.