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JAMB Physics 2013 Question 44

Question 44

Electromagnetic Induction

Induced emfs are best explained using

  1. A.Ohm's law.
  2. B.Faraday's law.
  3. C.Colomb's law.
  4. D.Lenz's law.
Show the answer and explanation

Answer: B (Faraday's law.)

Explanation

Faraday's law says an e.m.f. is induced whenever the magnetic flux through a circuit changes, and its size equals the rate of change of flux. Lenz's law only adds the direction.