Marine Electrical Systems USCG Question #1121 (Set 38)

An electrical component is connected across a 120 volt 60 hertz AC supply. What is the current drawn by the component if the impedance is 200 ohms?

Official USCG Answer & Rule Citation

Correct Answer: Option C — 0.60 amperes

Ohm's Law for AC circuits states that current equals voltage divided by impedance. Calculating 120 volts divided by 200 ohms yields 0.60 amperes. This fundamental electrical relationship is essential for calculating load currents in marine distribution systems under IEEE 45 standards.

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