The axle of a railway engine is of length`1.5m`. Calculate the e.m.f. that exists between the ends of the axle if the engine moves with a speed of 60 km/hr. The angle of dip `(phi)= 45^@` and horizontal component of earth's magnetic induction is `3.6 xx 10^-5 Wb//m^2`.

Calculate the de Broglie wavelength associated with an electron moving with a speed of 6xx10^5 m//s

Calculate the de Broglie wavelength of proton, if it is moving with a speed of 2 xx 10^5 m//s .

Two short bar magnets of length 1cm each have magnetic moments 1.20 Am^(2) and 1.00 Am^(2) respectively. They are placed on a horizontal table parallel to each other with their N poles pointing towards the south. They have a common magnetic equator and are separted by a distance of 20.0 cm . The value of the resultant horizontal magnetic induction at the mid - point O of the line joining their centres is close to (Horizontal component of earths magnetic induction is 3.6 xx 10.5 Wh//m^(2)

Calculate the value of induced emf between the ends of an axle of a railway carriage 1.75 m long travelling on a level ground with a uniform velocity of 50 Km//hr . The vertical component of Earth's magnetic field (B_v) is given to be 5 xx10^-5T .

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 direction of the emf?

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.

An emf of 100 mV is induced in a conductor of length 1.2m when it moves with a uniform velocity of 30m//s at right angles to a uniform magnetic field. Find the magnetic induction.

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 metergauge train runs northwards with a constant speed of 22 m/s on a horizontal track.The vertical component of the earth's magnetic field at that place is 3 xx 10^-4 T . the emf induced in its axle is