Which term refers to a device used to store electrical energy in a chemical form?

Which term refers to a device used to store electrical energy in a chemical form?

• A. Capacitor
• B. Battery
• C. Ammeter
• D. Brush

Answer: (B)

Storing electrical energy in chemical form means converting and storing energy as chemical energy inside the device, which can be released as electricity when the chemical reactions proceed. A battery is designed for that purpose: it contains chemical reactants and an electrolyte so that, during discharge, reactions at the electrodes produce a flow of electrons. When charging, those reactions can be reversed to store energy again. In contrast, a capacitor stores energy as an electric field between plates and does not rely on chemical reactions, so it’s not storing energy chemically. An ammeter simply measures current, and a brush is a conductive contact in rotating machines, not an energy storage device.

Storing electrical energy in chemical form means converting and storing energy as chemical energy inside the device, which can be released as electricity when the chemical reactions proceed. A battery is designed for that purpose: it contains chemical reactants and an electrolyte so that, during discharge, reactions at the electrodes produce a flow of electrons. When charging, those reactions can be reversed to store energy again.

In contrast, a capacitor stores energy as an electric field between plates and does not rely on chemical reactions, so it’s not storing energy chemically. An ammeter simply measures current, and a brush is a conductive contact in rotating machines, not an energy storage device.