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?

asked Feb 3, 2019 18.4k views

1 vote

by TBuLi

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1 vote

Power is voltage square divided by resistance.

P = U^2 / R

P = 7*7 / 3.5 = 49 / 3.5

P = 14 watts

Mister Why answered Feb 8, 2019

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