Marine Electrical Systems USCG Question #80 (Set 3)

What will happen to the total circuit resistance when additional parallel circuits are added to a circuit?

Official USCG Answer & Rule Citation

Correct Answer: Option B — it will decrease, causing an increase in the total load current

Adding parallel loads introduces additional current pathways, lowering total equivalent circuit resistance. According to Ohm's law, reduced resistance at a constant system voltage forces a corresponding increase in total load current supplied by the generator.

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