To determine the state of charge of a...

🔍 Key Concepts

• Difference between lead-acid and nickel-cadmium (Ni-Cd) batteries when judging state of charge • How specific gravity of electrolyte behaves (or doesn’t) in different battery chemistries • What measurements (voltage, current, electrolyte tests) actually change in a predictable way with state of charge for Ni-Cd wet cells

💭 Think About

• Ask yourself: in a nickel-cadmium battery, does the electrolyte density (specific gravity) change significantly as the battery charges and discharges, or does it stay nearly constant? • Consider which measurement gives a consistent, repeatable indication of how full the battery is, regardless of whether it is being charged or discharged. • Think about what each option is really telling you: level, voltage, specific gravity, or current. Which of these directly tracks how much energy is stored in a Ni-Cd battery?

✅ Before You Answer

• Verify what happens to electrolyte specific gravity in Ni-Cd batteries during charge and discharge compared to lead-acid batteries. • Check whether electrolyte level or current will necessarily correspond to how charged the battery is at any given time. • Confirm which parameter (voltage, current, level, or specific gravity) manufacturers recommend as the primary indicator of state of charge for nickel-cadmium wet cells.

To determine the state of charge of a nickel-cadmium wet-cell storage battery during charging and discharging, what is the most reliable method?

Checking the electrolyte level in the cells.

Measuring the voltage across the cells.

Checking the electrolyte specific gravity in the cells.

Measuring the battery current.

🔍 Key Concepts

💭 Think About

✅ Before You Answer