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Two rails of a railway track, insulated ...

Two rails of a railway track, insulated from each other and the ground, are connected to a millivoltmetre. What is the reading of the millivoltmetre when a train travels at a speed of 20 `ms^(-1)` along the track? Given that the vertical component of earth's magnetic field is `0.2xx10^(-4)"Wbm"^(-2)` and the rails are separated by 1 m

A

`10^(-2)`V

B

`10^(-4) ` V

C

`10^(-3)` V

D

1 V

Text Solution

Verified by Experts

The correct Answer is:
C
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The two rails of a railway track, insulataed form each other and from the ground, are connected to a millivoltmeter. What will be the reading of the millivoltmeter when a train travels on the track at a speed of 180km h^(-1)? The vertical component of earth's magnetic field is 0.2 X 10^(-4) and the rails are separted by 1m.

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Knowledge Check

  • A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 radians per second. If the horizontal component of earth's magnetic field is 0.2xx10^(-4)T , then the emf developed between the two ends of hte conductor is

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    B
    `5mV`
    C
    `50muV`
    D
    `50mV`

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