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Physics27. Resistors & DC CircuitsPower in Circuits

Multiple Choice

An incandescent lightbulb produces 100 W of light. If this lightbulb operates at 25% efficiency (meaning that out of all the power it generates, only 25% is released as light), what resistance must the lightbulb have if it operates at 120 V?

A

36 Ω

B

144 Ω

C

576 Ω

D

5.76 × 10⁶ Ω

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