Which device produces electricity by surrounding two metallic plates with a chemical electrolyte?

• A. Generator
• B. Battery
• C. Capacitor
• D. Transformer

Answer: (B)

The device that produces electricity by surrounding two metallic plates with a chemical electrolyte is a battery. A battery functions by converting chemical energy into electrical energy through electrochemical reactions that occur within the electrolyte solution, facilitating the movement of ions between the two plates, which are typically made of different metals. This process generates a flow of electric current, providing power to electrical devices.

In contrast, a generator converts mechanical energy into electrical energy but does not utilize a chemical electrolyte, while a capacitor stores electrical energy in an electric field created between two conductive plates but does not involve a chemical process. A transformer, on the other hand, is used to modify the voltage of alternating current and does not produce electricity itself; instead, it transfers electrical energy from one circuit to another. Using this knowledge, it's clear why a battery is the correct answer to the question.