A 150 W light bulb is operating on a 120 V rms ac line. What is the rms current in the bulb?
A) 2.50 A
B) 1.67 A
C) 1.50 A
D) 1.25 A
E) 0.883 A

Name: A 150 W light bulb is operating on a 120 V rms ac line. What is the rms current in the bulb? A) 2.50 A B) 1.67 A C) 1.50 A D) 1.25 A E) 0.883 A
Brand: Quizplus
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Question

Quizplus · Accepted Answer

We can use P=IV and P= Vrms^2/R to solve for the rms current. Rearranging the first equation, we get I=P/V. Plugging in the values, we get I= 150W/120V = 1.25A.

A 150 W Light Bulb Is Operating on a 120