In a region of a uniform magnetic induct...

In a region of a uniform magnetic induction `B=10^(-3)T`, a circular coil of raidus 40cm and resistance `pi^(3)Omega` is rotated about an axis which is perpendicular to the direction of `vecB` and which forms a diameter of the coil. If the coil rotates at 400 r.p.m., the amplitude of the alternating current induced in the coil is

`4pi^2mA`

30 mA

0.68 mA

200 mA

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