What type of voltage is supplied by a battery?

A battery supplies direct current (DC) voltage. This is characterized by a steady flow of electric charge in one direction, which is a fundamental characteristic of how batteries function. In a battery, chemical reactions occur that create a potential difference between the positive and negative terminals. This potential difference drives the movement of charge, resulting in a constant voltage output when connected to a circuit.

In contrast, alternating current (AC) is characterized by a flow of electric charge that periodically reverses direction, which is not what a battery produces. Radio frequency (RF) and low frequency (LF) refer to classifications within AC signals and not directly to the type of voltage generated by batteries, making them irrelevant to the question. Understanding that a battery is a source of DC voltage is crucial for many applications in electronics and electrical engineering.