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Question

A jet plane is travelling towards west at a speed of 1800 km/h.What is the voltage difference developed between the ends of the wing having a span of 25 m, if the Earth's magnetic filed at the location has a magnitude of 5×104T and the dip angle is 300?

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Solution

v=1800k/h
=1800×518
=500m/s
l=distance between the ends of the wings =25m
b=5×104T
θ=300
motional emf(e)=Bvvl(Bv=vertical componet of the earth magnetic field)
e=5×104sin300×500×25
e=3.1V
hence the voltage difference developed between the ends is 3.1V

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