• Subject:


  • Topic:


In a region of uniform magnetic induction B = 10–2 tesla, a circular coil of radius 30 cm and resistance π2 ohm is rotated about an axis which is perpendicular to the direction of B and which forms a diameter of the coil. If the coil rotates at 200 rpm the amplitude of the alternating current induced in the coil is 

(1) 4π2 mA

(2) 30 mA

(3) 6 mA

(4) 200 mA