Electromagnetic Induction - Result Question 32

32. A rectangular coil of 20 turns and area of crosssection 25 sq. cm has a resistance of 100Ω. If a magnetic field which is perpendicular to the plane of coil changes at a rate of 1000 tesla per second, the current in the coil is [1992]

(a) 1A

(b) 50A

(c) 0.5A

(d) 5A

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Answer:

Correct Answer: 32. (c)

Solution:

(c) i=eR=nAdBdtR

=20×(25×104)×1000100=0.5A



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