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A constant magnetic field of 1 T is applied in the x > 0 regions. A metallic circular ring of radius 1m is moving with a constant velocity of 1 m/s along the x-axis. At t = 0s, the centre of O of the ring is at x = -1m.

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A constant magnetic field of 1 T is applied in the x > 0 regions. A metallic circular ring of radius 1m is moving with a constant velocity of 1 m/s along the x-axis. At t = 0s, the centre of O of the ring is at x = -1m. What will be the value of the induced emf in the ring at t = 1s? (Assume the velocity of the ring does not change.)

(1) 1 V

(2) 2πV

(3) 2 V

(4) 0 V

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Correct answer: (3) 2 V

Explanation:

emf = BLV

= 1.(2R).1

= 2 V

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