An aircraftof wingspanof 50 m flieshorizontally in earth's magnetic field of `6 xx 10^-5` T at a speed of `400 m//s`. Calculate the emf generated between the tips of the wing of aircarft.

A cycle wheel with 10 spokes each of length 0.5 m long is rotated at a speed of 18 km//hr in a plane normal to the earth’s magnetic induction of 3.6 xx 10^-5 T . Calculate the e.m.f. induced between the ends of single spoke and ten spokes.

A meter gauge train is running towards north with speed of 20 m/s .The vertical component of earth's magnetic field is 3 xx 10^_4 (Wb)/m^2 . Calculate the e.m.f. induced at the end of the axle.

A cycle wheel with 10 spokes each of length 0.5 m long is rotated at a speed of 18 km//hr in a plane normal to the earth’s magnetic induction of 3.6 xx 10^-5 T . Calculate the e.m.f. induced between the axle and rim of the cycle wheel

A metal conductor of length 1m rotates vertically about one of its ends at angular velocity 5 radians per second. If the horizontal component of earth's magnetic field is 0.2 xx 10^-4T , then the e.m.f. developed between the two ends of the conductor is

The horizontal telegraph wire 100m long,oriented along magnetic east west falls freely under gravity to the ground with a speed of 20 cm/s. The horizontal component of earth's magnetic field is 4.0 xx 10^-5 tesla. Find the e.m.f. induced in the wire at the instant the wire strikes the ground.

A copper rod 1.5m long is rotated in a magnetic field of induction 6 xx 10^-5 (Wb)/m^2 .If it performs 1200 r.p.m.. find the e.m.f induced at its ends.

The vertical and horizontal components of the earth's magnetic induction at a place are 2 xx 10^-5 T respectiveley. Calculate dip and the magnitude of the earth's magnetic induction at that place.

A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0ms^-1 at right angles to the horizontal component of the earth's magnetic field, 0.30xx10^-4Wb m^-2 What is the instantaneous value of the emf induced in the wire?

The speed of light is 3 xx 10^8m//sec . Calculate the frequency of red light of wavelength of 6.5 xx 10^-7 m.