What type of device is a battery?

a voltage source
a motor
a magnet
an electric circuit

a voltage source

A battery is a voltage source.

The correct answer is "a voltage source." A battery is a type of electrical device that provides electrical energy by converting chemical energy into electrical energy. It consists of one or more electrochemical cells, which produce an electric potential difference, also known as voltage, between their terminals. This voltage is the source of electrical energy that can power various devices or circuits.

To determine the answer to this question, you can consider the properties and functions of a battery. Knowing that a battery is responsible for providing voltage, or electrical energy, to power devices or circuits helps identify it as a voltage source.