WAEC Physics 2013 Objective — Question 44
Question 44 of 50 from the West African Examinations Council (WAEC) Physics 2013 Objective paper, with the correct answer and a full explanation.
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Which of the following devices does not make use of eddy current for its action?
- A. A/An galvanometer
- B. Speedometer
- C. Induction furnace
- D. Induction coilCorrect
Explanation
Applications of eddy current include the induction furnace, the speedometer, the moving-coil galvanometer (damping), the sensitive mass balance, the breaker in large electric motors, and crack detection in railway tracks. (Per the printed answer key, the option identified as not using eddy current is D.)
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