A magnet is moved towards a coil. What is the source of electric current induced in the coil?

A short-circulated coil is placed ina time varrying magnetic field. Electrical power is dissipated due to the current induced in the coil. If the number of turns were to be quadrupled and the wire radius halve,d the electrical power dissipated would be

If a magnet is held stationary and a coil is moved towards the magnet, will there be any induced e.m.f. produced in the coil?

In a region of a uniform magnetic induction B=10^(-3)T , a circular coil of raidus 40cm and resistance pi^(3)Omega is rotated about an axis which is perpendicular to the direction of vecB and which forms a diameter of the coil. If the coil rotates at 400 r.p.m., the amplitude of the alternating current induced in the coil is

A current balance is a device to measure magnetic forces. It is constructed from two parallel coils, each with an average radius of 12.5 cm. The lower coil rests on a balance, it has 20 turns and carries a constant current of 4.0 A. The upper coil, suspended 0.314 cm above the lower coil, has 50 turns and a current that can be varied. The reading of the balance changes as the. magnetic force on the lower coil changes. What current is needed in the upper coil to exert a force of 1.0 N on the bottom coil?

A coil and a bar magnet move with the same velocity. What will be induced e.m.f. in the coil?

Two coils of wire A and B are placed mutaully perpendicular as shown in the figure. When current is changed in any one coil, will the current be induced in another 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?