A circular coil of 50 turns and diameter 8 cm carries a current 2 ampere. How much work will be done in rotating a coil through `180^@` when suspended in a uniform magnetic field `1 wb//m^2`.

A circular coil of 300 turns and diameter 14 cm carries a current of 15A. What is the magnetic moment of the loop?

A coil of 200 turns has a cross-sectional area 900 mm It carries a current of 2 ampere. The plane of the coil is perpendicular to the uniform magnetic field of 0.5T. Calculate : torque acting on the coil

A coil of 200 turns has a cross-sectional area 900 mm It carries a current of 2 ampere. The plane of the coil is perpendicular to the uniform magnetic field of 0.5T. Calculate : magnetic moment

A square coil of side 10cm consist of 20 turns and carries a current 10A. The coil is suspended vertically and normally and makes angle 30^@ with horizontal direction of uniform magnetic field 80T. What is the magnitude of torque experienced by the coil.

A circular coil of wire consisting of 80 turns, each of radius 50 mm carries a current of 0.25 A. What is the magnetic field at the centre of the coil?