a conducting disc of radius `R` roatates about its axis when an angular velocity `omega`.Then the potential difference between the centre of the disc and its edge is (no magnetic field is present ):

A metal disc of radius a rotates with a constant angular velocity omega about its axis. The potential difference between the center and the rim of the disc is ("m = mass of electron, e = charge on electro")

A metal disc of radius a rotates with a constant angular velocity omega about its axis. The potential difference between the center and the rim of the disc is ("m = mass of electron, e = charge on electro")

A non-conducting disc having unifrom positive charge Q , is rotating about its axis with unifrom angular velocity omega .The magnetic field at the centre of the disc is.

A non-conducting disc having unifrom positive charge Q , is rotating about its axis with unifrom angular velocity omega .The magnetic field at the centre of the disc is.

A non-conducting thin disc of radius R charged uniformly over one side with surface density s rotates about its axis with an angular velocity omega . Find (a) the magnetic induction at the centre of the disc, (b) the magnetic moment of the disc.

A non-conducting thin disc of radius R charged uniformly over one side with surface density s rotates about its axis with an angular velocity omega . Find (a) the magnetic induction at the centre of the disc, (b) the magnetic moment of the disc.

A conducting ring of radius r having charge q is rotating with angular velocity omega about its axes. Find the magnetic field at the centre of the ring.

A conducting ring of radius r having charge q is rotating with angular velocity omega about its axes. Find the magnetic field at the centre of the ring.