What is the maenig of 20mv?

The term "20mV" refers to a measurement of voltage, specifically 20 millivolts. In electrical terms, a millivolt is one-thousandth of a volt (1 mV = 0.001 V). This level of voltage is often used in various applications, such as in electronics, sensors, and signal processing, to indicate small electrical signals or to measure small changes in voltage.