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A square loop of side b is rotating with...

A square loop of side `b` is rotating with angular speed co about one of the diagonals as axis. At `t = 0`, the plane of the loop is perpendicular to the magnetic field `B`. If the number of turns of the loop be `N`, then the instantaneous flux through the coil is

A

`BAN`

B

`BAN sin omega t`

C

`BAN cos omega t`

D

`BAN omega t`.

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