WAEC Physics 2022 Objective — Question 29
Question 29 of 50 from the West African Examinations Council (WAEC) Physics 2022 Objective paper, with the correct answer and a full explanation.
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A lamp is rated 240V, 60W. Determine the resistance of the lamp when lit.
- A. 120 Ω
- B. 240 Ω
- C. 540 Ω
- D. 960 ΩCorrect
Explanation
Using P=V²/R: R=V²/P=240²/60=57600/60=960Ω.
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