A device used to store electrical energy in a chemical form.

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 happens when energy is put into chemical reactions inside a device, so it can be released as electricity later. A battery fits this role because it contains chemicals that react at the electrodes and in the electrolyte to store energy chemically. When you connect the battery to a circuit, those reactions release electrons, delivering electrical power. Capacitors store energy as an electric field between plates, not as chemical energy, so they don’t store energy chemically. An ammeter measures current, which is a flow of electrical charge, rather than storing energy. A brush is a conductive contact used in machines like motors or generators; it doesn’t store energy either. So, the device described is a battery, which can be single-use or rechargeable, depending on the chemistry involved.

Storing electrical energy in chemical form happens when energy is put into chemical reactions inside a device, so it can be released as electricity later. A battery fits this role because it contains chemicals that react at the electrodes and in the electrolyte to store energy chemically. When you connect the battery to a circuit, those reactions release electrons, delivering electrical power.

Capacitors store energy as an electric field between plates, not as chemical energy, so they don’t store energy chemically. An ammeter measures current, which is a flow of electrical charge, rather than storing energy. A brush is a conductive contact used in machines like motors or generators; it doesn’t store energy either.

So, the device described is a battery, which can be single-use or rechargeable, depending on the chemistry involved.