A battery cell consists of?

A battery cell consists of an electrolytic solution and two different metallic electrodes, which is why the correct answer is B. In a battery, these two electrodes, commonly referred to as the anode and cathode, serve essential roles in the electrochemical reactions that generate electrical energy. The electrolytic solution, often a liquid or gel containing electrolyte, facilitates the movement of ions between the electrodes, which is crucial for the chemical reactions to occur.

The differing materials of the electrodes are vital because they determine the voltage and overall efficiency of the battery. Each electrode undergoes specific reactions that produce or consume electrons, allowing for the flow of current when the battery is connected in a circuit. This combination of an electrolytic solution and two distinct electrodes is fundamental in the functionality of various types of batteries, including alkaline and lithium-ion batteries.

In contrast, other options may lack essential components necessary for a functioning battery cell. For instance, having only one metallic electrode or just a conductive solution would not facilitate the necessary electrochemical reactions to produce electric power effectively.