Final answer:
The electrolyte of a nickel-cadmium battery is the highest when the battery is being charged.
Step-by-step explanation:
The electrolyte of a nickel-cadmium (NiCad) battery is the highest when the battery is being charged.
During the charging process of a NiCad battery, the electrolyte, which is a potassium hydroxide (KOH) solution, undergoes a chemical reaction.
The chemical reaction involves the movement of ions and electrons between the anode and cathode of the battery, resulting in the highest concentration of electrolyte when the battery is being charged.