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A wire loop enclosing a semicircle of ra...

A wire loop enclosing a semicircle of radius `R` is located on the boundary of a uniform magnetic field `B`. At the moment `t = 0`, the loop is set into rotation with constant angular acceleration `alpha` about an axis `O`. The clockwise emf direction is taken to be positive.

The variation of emf as function of time is

A

`1/2BR^(2)alphat`

B

`3/2BR^(2)alphat`

C

`sqrt3BR^(2)alphat`

D

`(BR^(2)alphat)/(sqrt2)`

Text Solution

Verified by Experts

The correct Answer is:
A
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