The following three appliances are connected in parallel across an ideal 120-V dc power source: 1200-W toaster,650-W coffee pot,and 600-W microwave.If all were operated at the same time what total current would they draw from the source?
A)4.0 A
B)5.0 A
C)10 A
D)20 A

Question

Quizplus · Accepted Answer

The total power consumed by the appliances is the sum of their individual powers: 1200 W + 650 W + 600 W = 2450 W. Since power (P) is equal to the product of voltage (V) and current (I), i.e., P = VI, we can solve for the total current (I) by dividing the total power by the voltage: I = P/V = 2450 W / 120 V = 20.42 A, which rounds to 20 A for the purposes of this question.

The Following Three Appliances Are Connected in Parallel Across an Ideal