Marine Electrical Systems USCG Question #1124 (Set 38)

What will be the resulting current when a voltage of 12 VDC is applied to a capacitance of 470 microfarads in figure "C" of the illustrated circuit after the capacitor has had ample time to fully charge? EL-0018

USCG Exam Illustration EL-0018
USCG Examination Diagram: Illustration EL-0018
Official USCG Answer & Rule Citation

Correct Answer: Option D — 0.0 amps

In a direct current (DC) circuit, a capacitor acts as an open circuit once it is fully charged. After ample time, the voltage across the capacitor equals the supply voltage, stopping all current flow and resulting in a steady-state current of 0.0 amperes.

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