Which statement describes constant-voltage charging for nickel-cadmium batteries?

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Multiple Choice

Which statement describes constant-voltage charging for nickel-cadmium batteries?

Explanation:
Constant-voltage charging means the charger fixes the voltage across the battery terminals and allows the current to vary as the cell accepts charge. At the start, the battery may draw a higher current, but as the chemical state changes and the battery comes closer to full, the voltage across it rises and the charger reduces the current to keep that set voltage. That is why the hallmark is a constant voltage during charging, with the current tapering off over time. The other ideas—keeping current constant, keeping resistance constant, or keeping temperature constant—do not describe this charging mode.

Constant-voltage charging means the charger fixes the voltage across the battery terminals and allows the current to vary as the cell accepts charge. At the start, the battery may draw a higher current, but as the chemical state changes and the battery comes closer to full, the voltage across it rises and the charger reduces the current to keep that set voltage. That is why the hallmark is a constant voltage during charging, with the current tapering off over time. The other ideas—keeping current constant, keeping resistance constant, or keeping temperature constant—do not describe this charging mode.

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