Questions
A rectangular coil of 300 turns has an average area of average area of The coil rotates with a speed of 50 cps in a uniform magnetic field of strength about an axis perpendicular of the field. The peak value of the induced e.m.f. is (in volt)
detailed solution
Correct option is C
Peak value of emf =e0=ωNBA=2πvNBA =2π×50×300×4×10-2×25×10-2×10×10-2=30π volt.Talk to our academic expert!
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A loop, having area 20cm2, is made of thin copper wire. If is placed in a uniform magnetic field of induction 1.5 Tesla with its plane perpendicular to the field. If area of the loop increases to 30 cm2 in 0.5 second, average emf induced in the loop is
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