[" A small coil of radius "r" is placed at "],[" the centre of a large coil of radius "R" ,"],[" where "R<

A small coil of radius r is placed at the center of a large coil of radius R, where R>>r. The two coils are coplanar. The mutual inductance between the coils is proportional to

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

A small coil of radius r is placed at the centre of another coaxial coil of radius R(Rgtgtr) find the coeffcient for this pair of coils.

A small, flat coil of resitance r is placed at the centre of a large, closed coil of resistance R . The coils are coplanar. Their mutual inductance is M . Initially a constant current i was flowing in the inner coil. If this curent is suddenly swithced off, what charge will circulate in the outer coil?

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 circular current-carrying coil has a radius R . The distance from the centre of the coil, on the axis, where B will be 1//8 of its value at the centre of the coil is

A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be (1//8)^(th) of its value at the centre of the coil is,