A square copper coil of each side 8 cm consists of 100 turns. The coil is initially in vertical plane, such that the plane of the coil is normal to uniform magnetic field of induction `0.4 Wb m^(-2).` The coil is turned throuugh `180^(@)` about a horzontal axis in 0.2 s. Find the induced e.m.f.

A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspended vertically and the normal to the plane of the coil makes an angle of 30^@ with the direction of a uniform horizontal magnetic field of magnitude 0.80 T. What is the magnitude of torque experienced by the coil?

State the factors on which induced e.m.f. in a coil rotating in a uniform magnetic field depends.

A rectangular coil of N turns and ara of cross-section A is held in a time-varying field given by B = B_0 cosomegat , with the plane of the coil noral to the magnetic field. Deduce an expression for the e.m.f. induced in the coil.

A closely wound rectangular coil of 200 turns and size 0.3 m xx 0.1 m is rotating in a magnetic field of induction 0.005 Wb m^-2 with a frequency of 1,800 r.p.m. about an axis normal to the field. Calculate the maximum value of induced e.m.f.

A coil of metallic wire is stationary in non-uniform magnetic field. What is the e.m.f induced in 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?