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  1. lightbulb

    Light Bulb Resistance

    Hello folks. I have a question about a common household light bulb. From Ohms Law, we know that V = I * R, and from this we can derive that Power = V^2 / R. Solving for resistance, R = V^2 / P. For a 60 W light bulb operating at 115 V AC, the resistance should be 115^2 / 60 = 220 ohms. No...

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