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JAMB Physics 2007 Question 16

Question 16

Electromagnetic Induction

Lenz's law is a law of the conservation of

  1. A.energy.
  2. B.momentum.
  3. C.electric current.
  4. D.electric charge.
Show the answer and explanation

Answer: A (energy.)

Explanation

The induced current opposes the change causing it, so work must be done to produce it. This is the conservation of energy.