Marine Electrical Systems USCG Question #576 (Set 20)

Two 100 watt light bulbs rated at 100 volts are connected in parallel across a 100 volt power supply. What will be the total power consumed by the two bulbs?

Official USCG Answer & Rule Citation

Correct Answer: Option C — 100 watts

In a parallel circuit, total power consumed is the sum of the individual component power ratings. Two 100-watt bulbs operating at their rated voltage consume a combined total of 200 watts, adhering to standard power distribution principles outlined in IEEE 45.

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