A train is moving in the north-south direction with a speed of `108 kmh^(-1)`. Find the e.m.f. generated between two wheels, if the length of the axle is 2m. Assume that the vertical component of earth's field is `8.0 xx 10^(-5) Wbm^(-2)`.

Metallic wire 1m in length is moving normally across a field of 0.1 T with a speed of 5 ms^-1 . Find the e.m.f between the ends of the wire.

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

Calculate the e.m.f. induced between the ends of an axle 1.75 m long of a railway carriage travelling at the rate of 50 km h^-1 . The vertical component of the earth's magnetic field 0.5 xx 10^-4 weber m^-2

A short magnet of magnetic moment 2.0 Weber-metre is lying in a horizontal plane with its north pole pointing 60^(@) east of north. Find the net magnetic field at a point north of the magnet 0.2 m away from it. Horizontal component of earth's magnetic field = 0.3 xx 10^(-4) T.

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 railway track running North South has two parallel rails 1.0m apart. Calculate the value of induced e.m.f. between the rails when a train passes at a speed of 90 kmh(-1) . Horizontal component of earth’s field at that place is 0.3xx1O(-4) Wbm(-2) and angle of dip is 60^@ .

The radius of curvature of a railway track at a place where the train is moving at a speed of 72 km h^-1 is 625 m.The distance between the rails is 1.5 m.Find the angle and the elevation of the outer rail so that there may be no side pressure on the rails. (g=9.8 m s^(-2)) .

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.

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?