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The two rails of a railway track, insulated from each other and the ground, are connected to a milli voltmeter. What is the reading of the milli voltmeter when a train travels at a speed of `180 km//hours` along the track, given that the vertical components of earth's magnitic field is `0.2xx10^(_4) weber//m^(2)` & the rails are separated by 1 meter?

A

`1mV`

B

`2mV`

C

`3mV`

D

`4mV`

Text Solution

Verified by Experts

The correct Answer is:
A
`e=Bvl=0.2xx10^(-4)xx180(5)/(18)xx1`
`=10^(-3)V=1mV`
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