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Question

An aeroplane, in which the distance between the tips of the wings is 50m, is flying horizontally with a speed of 360 km/hour, over a place where the vertical component of earth's magnetic field is 2.0×104 tesla . The potential difference between the tips of the wings would be

A
0.1V
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B
0.5V
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C
0.2V
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D
1.0V
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Solution

The correct option is B 1.0V
Given : We have distance between tip of wings=50m
Velocity=360km/hour v=100m/sec
B=2×104

Solution:
We have a formula for finding potential diffrence between two points at a distance l apart as E=Blv

Where B= magnetic field, l=distance between two points , v=velocity

Substituting all the values in the formula we get E=2×104×50×100
E=1 volt
The correct opt : D

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