A conducting rign of mass 100 gram and radius `0*5m` is placed on a smooth horizontal plane. The ring carries a current of `I=4A`. A horizontal magnetic field `B=10T` is switched on at time `t=0` as shown in figure. The initial angular acceleration of the ring is

A conducting ring of mass 2 kg and radius 0.5 m is placed on a smooth horizontal plane. The ring carries a current . A horizontal magnetic field B = 10T is switched on at time t = 0 as shown in figure. The initial angular acceleration of the ring will be:

A conducting ring of mass 2kg and radius 0.5m is placed on a smooth plane. The ring carries a current of i=4A . A horizontal magnetic field B=10 T is switched on at time t=0 as shown in fig The initial angular acceleration of the ring will be .

In the shown figure a conducting ring of mass = 2kg and radius R = 0.5 m. lies on a smooth horizontal plane with its plane vertical. The ring carries a current of I = (1)/(pi)A . A horizontal uniform magnetic field of B = 12T is switched on at t =0. The initial angular acceleration alpha in rad//sec^(2) of the ring will be 4x if x is :

A non-conducting ring having q uniformly distributed over its circumference is placed on a rough horizontal surface. A vertical time varying magnetic field B = 4t^(2) is switched on at time t = 0. Mass of the ring is m and radius is R. The ring starts rotating after 2 s, the coefficient of friction between the ring and the table is

A metal rign of mass m and radius R is placed on a smooth horizontal table and is set rotating abut its own axis in such a way that each part of the ring moves with a speed v. Find the tension in the ring.

A conducting ring of mass m = pi kg and radius R = (1)/(2)m is kept on a flat horizontal surface (xy plane). A uniform magnetic field is switched on in the region which changes with time (t) as vec(B) = (2hatj +t^(2) hatk)T . Resistance of the ring is r = pi Omega and g = 10 ms^(-2) . (a) Calculate the induced electric field at the circumference of the ring at the instant it begins to topple. (b) Calculate the heat generated in the ring till the instant it starts to topple.

A conducting ring of radius 2R rolls on a smooth horizontal conducting surface as shown in figure-5.295. A uniform horizontal magnetic field B is perpendicular to the plane of the ring. The potential of A with respect to O is: