Marine Electrical Systems USCG Question #167 (Set 6)

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

Using Ohm's law for alternating current circuits ($I = \frac{V}{Z}$), dividing the supply voltage of 120 volts by the total impedance of 200 ohms results in 0.60 amperes. This principle governs basic marine AC distribution circuit loading per IEEE 45 and 46 CFR Subchapter J.

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