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Question

An aeroplane is flying horizontally with a velocity of 360 km/h. The distance between the tips of the wings of aeroplane is 25m. The vertical component of earth's magnetic field is 4×104Wb/m2. The induced e.m.f. is

A
1 V
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B
100 V
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C
1 kV
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D
Zero
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Solution

The correct option is A 1 V
Given,
B=4×104Wb/m2
v=360km/h=360×100060×60=100m/s
l=25m
The induced emf can be given by the expression:
emf=Blv
emf=4×104×25×100=1V
The correct option is A.

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