A light bulb is rated at 30 W when operated at 120 V.How much charge enters (and leaves) the light bulb in 1.0 minute?
A)17 C
B)15 C
C)14 C
D)13 C
E)60 C

Question

Quizplus · Accepted Answer

We can use the formula P = VI to find the current flowing through the light bulb:

30 W = 120 V x I

I = 0.25 A

To find the charge that enters and leaves the light bulb in 1.0 minute, we can use the formula Q = It, where Q is the charge, I is the current, and t is the time:

Q = It = 0.25 A x 60 s = 15 C

Therefore, the answer is B) 15 C.

A Light Bulb Is Rated at 30 W When Operated