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A straight rod of length l si rotating a...

A straight rod of length `l` si rotating about axis passing through `O` is shown. A uniform magnetic field `B` exists parallel to the axis of rotation. `E.m.f` induced between `P` and `Q` is:

A

`(8)/(25) B omega l^(2)`

B

`(3)/(10)B omega l^(2)`

C

`(7)/(25)B omega l`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
B
`e = B omega int_(-1//5)^(4l//5)x dx = (3B omega l^(2))/(10)`
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