WAEC Physics 2023 Objective — Question 46
Question 46 of 50 from the West African Examinations Council (WAEC) Physics 2023 Objective paper, with the correct answer and a full explanation.
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Which of the following devices is associated with alternating currents only?
- A. Induction coil
- B. Lead-acid accumulator
- C. Step-up transformerCorrect
- D. Moving-coil galvanometer
Explanation
A step-up transformer works only with alternating current (AC), since transformers rely on a changing magnetic flux which only AC can provide.
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