In Fig. a coil of single turn is wound on a sphere of radius r and mass m. The plane of the coil is parallel to the inclined plane and lies in the equatorial plane of the sphere. If the sphere is in rotational equilibrium, the value of B is [Current in the coil is i]

Figure shows a coil of single turn would on a sphere of radius R and mass m. The plane of the coil is parallel to the plane and lies in the equatorial plane of the sphere. What is the value of B if the sphere is in equilibrium when current in the coil is I?

A solid sphere of mass m rolls down an inclined plane a height h . Find rotational kinetic energy of the sphere.

A disc and a solid sphere of same mass and radius roll down an inclined plane. The ratio of thhe friction force acting on the disc and sphere is

A solid sphere having mass m and radius r rolls down an inclined plane. Then its kinetic energy is

P is a solid sphere and Q is a hollow sphere both having the same mass and radius .If they roll down from the top of an inclined plane , on reaching the bottom .

When a sphere of moment of inertia 'I' rolls down an inclined plane then find the percentage of rotational kinetic energy of the total energy.

A coil of radius r is placed at the centre of R>>r and coils are in same plane.The coefficient of mutual inductance between the coil is

A nollow sphere and a solid sphere having same mass and same radii are rolled down a rough incline plane.

A thin wire is wound very tightly in one layer on the surface of a sphere of paramagnetic material (mu_(r)~~1) . The planes of all the turns can be assumed to be perpendicular to the same diameter of the sphere. The turns over the entire surface of the sphere. The radius of the sphere is R , the total number of turns is N , and the current in the winding is I . Find the magnetic induction at the centre of the sphere. (Given mu_(0)NI=20R )