A metre gauge train is runing due north with a constant speed of `90 km h^-1` on a horizontal track. If the vertical component of earth's magnetic ield is `3xx10^-5 W b m^-2`, calculate the e.m.f. induced across the axle of the train of length 1.25 cm.

In a ceiling fan, each blade rotates in a circle of radius 0.5 m. If the fan makes 2 rotation per second and the vertical component of the earth's magnetic field is 8xx 10^-5 T , calculate the emf induced between the inner and outer ends, of each blade.

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

A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0 m s^-1 , at right angles to the horizontal component of the earth’s magnetic field, 0.30 xx 10^-4 Wb m^-2 , What is the direction of the emf?

A satellite with a 40 cm long copper wire on its bottom is revolving around the earth at 7.8 km per second, such that the wire is perpendicular to the vertical component of earths' magnetic field. Determine the e.m.f. induced across this wire, if the magnitude of the vertical component of magnetic field is 0.2 gauss.

A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0 m s^-1 , at right angles to the horizontal component of the earth’s magnetic field, 0.30 xx 10^-4 Wb m^-2 , Which end of the wire is at the higher electrical potential?

An aeroplane in which the distance between the tips of wings is 50 m is flying horizontal with a speed of 360km//hr over a place where the verticle components of earth magnetic field is 2.0xx10^(-4)webr//m^(2) . The potential different between the tips of wings would be

The two rails of a railway track, insulated from each other and the ground, are connected to a milli voltmeter. What is the reading of the milli voltmeter when a train travels at a speed of 180 km//hours along the track, given that the vertical components of earth's magnitic field is 0.2xx10^(_4) weber//m^(2) & the rails are separated by 1 meter?

A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 rad s^(-1) . If the horizontal component of the earth's magnetic field is 0.2xx10^(-4) T , then e.m.f. developed between the two ends of the conductor is

An aircraft with a wingspan of 40 m flies with a speed of 1080 km/hr in the eastward direction at a constant altitude in the northern hemisphere, where the vertical component of the earth's magnetic field 1.75 xx10^(-5) . Then the emf developed between the tips of the wings is