Two 100 W Bulbs Differ in That One Is Designed

Two 100 W bulbs differ in that one is designed for the North American 120 V rms electric supply, while the other is designed for the European 220 V rms. Which bulb has the greater resistance, and what is that resistance?

A) North American, 288 Ω
B) North American, 144 Ω
C) European, 484 Ω
D) European, 242 Ω
E) they are the same, 265 Ω

Correct Answer:

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