The maximum number of 40-W lightbulbs we can connect in parallel in a 120-V circuit without tripping a 20-A circuit breaker is
A) 20
B) 30
C) 40
D) 60
E) 80

Name: The maximum number of 40-W lightbulbs we can connect in parallel in a 120-V circuit without tripping a 20-A circuit breaker is A) 20 B) 30 C) 40 D) 60 E) 80
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Question

Quizplus · Accepted Answer

The total current is the sum of the currents through each bulb. Each 40-W bulb draws 40W/120V = 0.333A. A 20-A breaker can handle 20A/0.333A ≈ 60 bulbs.

The Maximum Number of 40-W Lightbulbs We Can Connect in Parallel