A helicopter rises vertically upwards with a speed of 100 `m//s`. If the helicopter has a length of 10m and horizontal component of earth's magnetic field is `5 xx 10^(-3)Wb//m^(2)`, then the induced emf between the tip of the nose and the tail of the helicopter is

A helicopter rise verticaly with a speed of 10ms^(-1) . If helicopter has a length of 10 m and the horizontal component of the earth's magentic field is 1.5 xx 10^(-3) Wbm^(2) , the emf induced between the tip of the nose and the tail of the helicopter, is

A metre gauge train is running towards north with a speed of 20 m//s . If the vertical component of earth's magnetic induction is 3 xx 10^(-4) Wb//m^(2) , then the e.m.f. induced at the end of the axle is

The horizontal component of earth's magnetic field is 3xx10^(-5) Wb//m^2 . The magnetic flux linked with a coil of area 1m^2 and having 5 turns, whose plane is normal to the magnetic field, will be

A train is moving towards north with a speed of 25 m/s. if the vertical component of the earth's magnetic field is 0.2 xx 10^(-4) T, the emf induced in the axle 1.5 m long is

A short magnet of moment 6.75 Am^(2) produces a neutal point on its axis. If horizontal component of earth's magnetic field is 5xx10^(-5) "Wb"//m^(2) , then the distance of the neutal point should be

An aeroplane having a distance of 50 metre between the edges of its wings is flying horizontally with a speed of 360km // hour. If the vertical component of earth’s magnetic field is 4 xx 10^(–4)" weber"//m^(2) , then the induced emf between the edges of its wings will be –

The axle of a railway engine is of length 150 cm. the engine oves with a speed of 60 km/hr in horizontal direction the angle of dip is 46^(@) and horizontal component of earth's magnetic induction is 3.6xx10^(-5)Wb//m^(2) . The emf that will exist between the ends of the axle is

A helicopter has metallic blades with a length pf 3 m extending outward from a central hub and rotating at 2rev//s . If the vertical component of the earht's magnetic field is 50 mu T , then the emf induced between the blade tip and the centre hub is