Which type of voltage source uses chemical action to produce voltage?

The type of voltage source that uses chemical action to produce voltage is a battery. A battery generates electrical energy through electrochemical reactions that occur within its cells. These reactions involve chemical compounds that release energy in the form of electrons, leading to a flow of electric current when the battery is connected in a circuit.

The structure of a battery consists of an anode, cathode, and an electrolyte, which facilitate this chemical process. As such, batteries are commonly used in various applications where portable and reliable power sources are needed, including in electronic devices and vehicles.

In contrast, generators typically convert mechanical energy into electrical energy using electromagnetic induction, capacitors store electrical energy as an electrostatic field and release it when needed, and power supplies convert alternating current (AC) from the grid into a regulated direct current (DC) voltage suitable for electronic devices. Each of these methods does not rely on chemical reactions like batteries do to produce voltage.