A square loop of side 10 cm and resistance `0.5Omega` is placed vertically in the east-west plane. A uniform magnetic field of 0.10 T is set up across the plane in the north-east direction. The magnetic field is decreased to zero in 0.70 s at a steady rate. Determine the magnitudes of induced emf and current during this time-interval.

A semi-circular loop of radius 30 cm wire carries current 6 A. An uniform magnetic field 0.5 T is present perpendicular to the plane of the loop. What is the magnitude of force exerted on the wire ?

A circular coil of radius 10 cm, 500 turns and resistance 2 Omega is placed with its place,perpendicular to the horizontal component of the earth's magnetic field. It is rotated about its vertical diameter through 180^@ in 0.25 sec . Estimate the magnitudes of the EMF and current induced in the coil .[horizontal component of the earth's magnetic field at the place is 3.0 times 10^-5 T ).

A coil of 100 turns and area 5 square centimetre is placed in a magnetic field B = 0.2T. The normal to the plane of the coil makes an angle of 60^(@) with the direction of the magnetic field. The magnetic flux linked with the coil is

A copper rod of length 2m is rotated with a speed of 10 rps, in a uniform magnetic field of T tesla about a pivot at one end. The magnetic field is perperndicular to the plane of rotation. Find the emf induced across its ends