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16-10-2018
Physics

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A bulb in a circuit has a resistance of 3.5 ohms. The circuit has a voltage of 7 V. What is the power output of the bulb?

Respuesta :

16-10-2018

Power is voltage square divided by resistance.

P = U^2 / R

P = 7*7 / 3.5 = 49 / 3.5

P = 14 watts

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