What is maximum number of 150 W light bulbs that can run on a 130 V (rms) circuit protected by a 20 A (rms) circuit breaker?
A) 18
B) 16
C) 17
D) 15

Question

Quizplus · Accepted Answer

The maximum power that can be drawn from the circuit is given by P = V * I, where V is the voltage and I is the current. Here, V = 130 V and I = 20 A, so P = 130 V * 20 A = 2600 W. Each light bulb uses 150 W, so the maximum number of bulbs = 2600 W / 150 W = 17.33. Since we can't have a fraction of a bulb, the maximum number of bulbs is 17.

What Is Maximum Number of 150 W Light Bulbs That