A small piece of metal wire is dragged across the gap between the pole pieces of a magnet in 0.5 s. The amgnetic flux between the pole pieces is known to be `8 xx 10^-4 Wb`. Estimate the e.m.f. induced in the wire.

A piece of wire is passed thorugh the gap between the poles of a magnet in 0.1 s. An e.m.f. of 4xx10^-3V is induced in the iwre. The magnetic flux between the poles of the magnet is

The magnetic flux threading a coil changes from to 12x10(-3) Wb to 6x10(-3) Wb in 0.015 .Calculate the induced e.m.f.

A rectangular loop of sides 8 cm and 2 cm with a cut is stationary between the pole pieces of an electromagnet. The magnetic field of the magnet is normal to the loop. The current feeding the electromagnet is reduced so that the field decreases from its initial value of 0.3 T at the rate of 0.02 T s^-1 . If the cut is joined and the loop has a resistance of 1.6 Omega , how much power is dissipated by the loop as heat? What is the source of this power?

A wire is cut across a flux of 0.2x10(-2) weber in 0.12 seconds. What is the e.m.f. induced in the wire ?

A coil in the shape of an equilateral triangle of side 0.02 m is suspended from a vertex such that it is hanging in a vertical plane between the pole pieces of a permanent magnet producing a horizontal magnetic field of 5 xx 10^(-2) T. Find the couple acting on the coil when a current of 0.1 A is passed through it and the magnetic field is parallel to its plane.

A metallic wire bent in the form of a semicircle of raidus 0.1 m is moved into magnetic field of 20 mT in a direction parallel to its plane, but perpendicular to the magnetic field with a velocity of 10 ms^-1 . Find the e.m.f. induced in the wire.