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Question

Two rails of a railway track insulated from each other and the ground are connected to a milli voltmeter. What is the reading of voltmeter, when a train travels with a speed of 180 km/hr along the track. Given that the vertical component of earth's magnetic field is 0.2× 104 T and the rails are separated by 1 metre

A
102 Volt
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B
104 Volt
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C
103 Volt
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D
1 Volt
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Solution

The correct option is C 103 Volt

e=Bv.vl=0.2× 104× (180× 10003600)× 1=103V


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