In a region of uniform magnetic inductance `B=10^(-2)`tesla. A circular coil of radius `30 cm` and resistance `pi^(2) ohm` is rotated about an axis which is perpendicular to the direction of `B` and which forms a dimater of the coil. If the coil rotates at `200` r.p.m the amplitude of the alternatic current induced in the coil isA. `4pi^(2)mA`B. `30 mA`C. `6 mA`D. `200 mA`

In a region of uniform magnetic inductance `B=10^(-2)`tesla. A circula

1.	In a region of uniform magnetic inductance `B=10^(-2)`tesla. A circular coil of radius `30 cm` and resistance `pi^(2) ohm` is rotated about an axis which is perpendicular to the direction of `B` and which forms a dimater of the coil. If the coil rotates at `200` r.p.m the amplitude of the alternatic current induced in the coil isA. `4pi^(2)mA`B. `30 mA`C. `6 mA`D. `200 mA`
Answer» Correct Answer - C Amplication of `ac=i_(0)=(V_(0))/R=(omegaNBA)/R=((2piv)NB(pir^(2)))/R` `implies i_(0)=(2pixx200/60xx1xx10^(-2)xxpixx(0.3)^(2))/(pi^(2))=6mA`

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