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Question: Answered & Verified by Expert
The mutual inductance between two coils is 1.25 henry. If the current in the primary changes at the rate of 80 ampere/second, then the induced e.m.f. in the secondary is
PhysicsElectromagnetic InductionJEE Main
Options:
  • A $12.5 \mathrm{~V}$
  • B $64.0 \mathrm{~V}$
  • C $0.016 \mathrm{~V}$
  • D $100.0 \mathrm{~V}$
Solution:
1528 Upvotes Verified Answer
The correct answer is: $100.0 \mathrm{~V}$
$e=M \frac{d i}{d t}=1.25 \times 80=100 \mathrm{~V}$

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