A circular coil of 100 turns has an effective radius of 0.05 m and carries a current of 0.1 A. How much work is required to turn it in an external magnetic field of `1.5 Wb m^-2 `through `180^@` about an axis perpendicular to the magnetic field. The plane of the coil is initially perpendicular to the magnetic field.

A circular coil of 50 turns and radius 0.2 cm carries a current of 12 A. Find magnetic moment associated with it.

A circular coil of 50 turns and radius 0.2 cm carries a current of 12 A. Find magnetic field at the centre of the coil.

A circular coil of 200 turns and radius 0.2 m carries a current of 14 A. What is the magntitude of magnetic moment associated with the coil?

A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

A circular coil of 16 turns and radius 10 cm carrying a current of 0.75 A rests with its plane normal to an external field of magnitude 5.0 xx 10^-2 T. The coil is free to turn about an axis in its plane perpendicular to the field direction. When the coil is turned slightly and released, it oscillates about its stable equilibrium with a frequency of 2.0 s^-1 . What is the moment of inertia of the coil about its axis of rotation?

A circular currernt loop of magentic moment M is an arbitrary orientatio in an external magnetic field B. The work done to rotate the loop by 30^@ about an axis perpendicular to its plane is:

A straight conductor carries a current of 1.5 A and is 2 m long. is placed in a uniform magnetic field of 0.15 T Find the force on it, when it is perpendicular.