What is the nominal open-circuit cell voltage of one lead-acid storage battery cell?
Official USCG Answer & Rule Citation
Correct Answer: Option B — 2 volts
Electrochemical reactions between lead peroxide positive plates, spongy lead negative plates, and sulfuric acid electrolyte generate a nominal open-circuit potential of approximately 2.0 volts per single cell in a standard lead-acid storage battery.
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