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) $5.0 \mathrm {~A}$
B) $4.0 \mathrm {~A}$
C) $20 \mathrm {~A}$
D) $10 \mathrm {~A}$

Question

Quizplus · Accepted Answer

The total power consumed by the appliances is the sum of their individual powers: $1200\,W + 650\,W + 600\,W = 2450\,W$. The total current drawn from the source is calculated using the formula $I = \frac{P}{V}$, where $P = 2450\,W$ and $V = 120\,V$. Thus, $I = \frac{2450}{120} = 20.42\,A$, which rounds to $20\,A$, making option C correct.

The Following Three Appliances Are Connected in Parallel Across an Ideal