PhysicsElectrical energy and powerJAMB
Find the resistance of a bulb rated 100 W, 220 V.
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Answer: C. 484 Ω
R = V²/P = 220²/100 = 48 400/100 = 484 Ω.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.