What is the ampere-hour rating of a lead-acid battery that can deliver 20 amperes continuously for 10 hours?
Official USCG Answer & Rule Citation
Correct Answer: Option C — 200
Ampere-hour capacity is calculated by multiplying the discharge current by the discharge time duration. Multiplying 20 amperes by 10 hours yields exactly 200 ampere-hours, representing the total electrical energy storage capacity of the lead-acid battery.
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