What is the current in a 75 W light bulb that is plugged into 120 V household outlet?

asked Sep 25, 2016 56.1k views

1 vote

What is the current in a 75 W light bulb that
is plugged into 120 V household outlet?

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3 votes

P=VI
75=240*I
L=75 / 240
I rms =0.3125 A

Dan Klos answered Sep 27, 2016

8.6k points

3 votes

Power = (voltage) x (current)

Divide each side by (voltage):

Current = (power) / (voltage)

I = (75) / 120 = 0.625 Amperes = 625 mA

Anuvrat Tiku answered Sep 29, 2016

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