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Unilorin Post-UTME Physics 2022 (Model questions) Question 5

Question 5

Electromagnetic Induction

How can energy loss be minimized through Eddy-current?

  1. A.By using high resistance wire
  2. B.By using insulated soft iron wires
  3. C.By using low resistance wires
  4. D.By using turns of wires
Show the answer and explanation

Answer: B (By using insulated soft iron wires)

Explanation

Making the core from insulated soft-iron wires or laminations breaks up the paths of eddy currents, so less energy is wasted as heat.