A thin ring of mass 0.1kg and diameter 0.5m carrying charge q is free to rotate about an axis as shown in the figure.At t=0, time dependent magnetic field of 8t Tesla is applied vertically down on the ring.If the ring is at rest before applying magnetic field and induced magnetic effects due to rotation of the ring are neglected,the power developed by the force acting on the ring after 10sec is found to be 6.4mw .Find the charge q that the ring is carrying?

Magnetic field due to ring

A ring of mass 10 kg and diameter 0.4m is rotated about an axis passing through its centre and perpendicular to its plane moment of inertia of the ring is

A ring of mass m and radius R is given a charge q. It is then rotated about its axis with angular velocity omega .Find (iii)Magnetic moment of ring.

A ring of mass m and radius R is given a charge q. It is then rotated about its axis with angular velocity omega .Find (ii) Magnetic field produced at the centre of ring.

A ring of mass 10kg and diameter 0.4m is rotated about an axis passing through its centre. If it makes 1800 revolutions per minute then , the angular momentum of the ring is

A circular conducting ring is rotated about one its diameter in a magnetic field

A thin non-conducting ring of mass m carrying a charge q can freely rotate about its axis. At t = 0 , the ring was at rest and no magnetic field was present. Then suddenly a magnetic field B was set perpendicular to the plane. Find the angular velocity acquired by the ring.

A thin non-conducting ring mass m , radius a , carrying a charge q can rotate freely about its own axis which is vertical. At the initial moment the ring was at rest and no magnetic field was present. At instant t = 0 , a uniform magnetic field is switched on which is vertically downwards and increase with time according to the law B = B_(0)t . Neglecting magnetism induced due to totational motion of the ring. Now answer the following questions. The power developed by the forces acting on the ring, as a function of time :

A thin non-conducting ring of mass m carrying a charge q can freely rotate about its axis. At the initial moment the ring was at rest and no magnetic field was present. Then a practically unifrom magnetic field was switched on, which was perpendicular to the planeof the ring and increased with time according to a certain law B (t) , Find the angluar velocity omega of the ring as a function of the induction B(t) .