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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 a function of time is

A

B

C

D

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The correct Answer is:
A
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