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JAMB Physics 2025 Objective — Question 28

Question 28 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2025 Objective paper, with the correct answer and a full explanation.

The induced emf in a coil increases when:

A. the coil's resistance increases
B. a stronger magnet is usedCorrect
C. the magnet is moved more slowly
D. the coil has fewer turns

Explanation

Faraday: emf ∝ dΦ/dt; stronger magnet increases flux change, increasing emf.

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