GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the maximum number of 60-W light bulbs you can connect in parallel in a 120-V home circuit without tripping the 30-A circuit breaker?
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11
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35
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59
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3600
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Explanation:
Detailed explanation-1: -So, 18 bulbs of 60 watts may be safely run on 220V using a 5A fuse.
Detailed explanation-2: -V = 120 V, Maximum current flowing in the circuit = 20A. Power delivered by each light bulb = 100 W. P = V*I. Therefore, maximum number of bulbs that can be connected without tripping the circuit is 23.
Detailed explanation-3: -Assuming the lights are incandescent, you can use the formula P (watts) = V (volts) x I (current. Volts is 120 and current is 20. This equals 2, 400 watts meaning 24 100 W light globes can be used without tripping the circuit.
Detailed explanation-4: -A circuit has fuse of 5A. What us the maximum number of 100W bulbs that can be safely used in circuit? x = 220 x 5 /100 = 11 bulbs.
There is 1 question to complete.