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A long metal bar of 30cm length is aling...

A long metal bar of `30cm` length is alinged along a north south line and moves eastward at a speed of `10 ms^(-1)`. A uniform magnetic field of `4.0 T` points vertically downwards. If the south end of the bar has a potential of `0 V`, the induced potential at the north end of the bar is

A

`+12 V`

B

`-12 V`

C

`0 V`

D

cannot be determined since there is not closed circuit

Text Solution

Verified by Experts

The correct Answer is:
A
`e=Blv=4xx0.3xx10`
=12 volt
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