If the power consumed by a bulb is 60 W and the voltage across it is 120 V, what is the resistance of the bulb?
240 Ω
Electric power is related to voltage and resistance by P = V2 / R, so R = V2 / P.
R = (120)2 / 60 = 14400 / 60 = 240 Ω.
Hence, the answer is 240 Ω.
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