Voltmeter

A voltmeter is a measuring instrument used to measure the voltage or potential difference between two points in an electrical circuit. It is commonly used in electrical and electronic testing and troubleshooting.

Voltmeters can be analog or digital. Analog voltmeters have a needle that moves across a scale to indicate the voltage, while digital voltmeters display the voltage as a numerical value on a digital screen.

Voltmeters are typically connected in parallel to the circuit being measured, with the positive terminal connected to the higher potential point and the negative terminal connected to the lower potential point. They are designed to have a high input impedance, so they do not draw significant current from the circuit being measured.

Voltmeters can measure both AC (alternating current) and DC (direct current) voltages. Some voltmeters have multiple ranges, allowing them to measure a wide range of voltages.

In addition to measuring voltage, some voltmeters may have additional features such as resistance measurement, continuity testing, and diode testing.

Overall, voltmeters are essential tools for electrical and electronic engineers, technicians, and hobbyists to accurately measure voltage in various circuits and systems.