ammeter
Sign in to savethumb|Demonstration model of a moving iron ammeter. As the current through the coil increases, the plunger is drawn further into the coil and the pointer deflects to the right.
AI overview
An ammeter is a device that measures the strength of electric current flowing through a circuit, with the measurement displayed by a pointer that moves across a scale. It matters because knowing how much current is flowing helps people safely operate electrical equipment and diagnose problems in electrical systems.
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Article
15 sectionsContents
- History
- Types
- Moving-coil
- Moving magnet
- Electrodynamic
- Moving-iron
- Hot-wire
- Digital
- Integrating
- Picoammeter
- Application
- See also
- Notes
- References
- External links
thumb|Demonstration model of a moving iron ammeter. As the current through the coil increases, the plunger is drawn further into the coil and the pointer deflects to the right.
An ammeter (abbreviation of ampere meter) is an instrument used to measure the current in a circuit. Electric currents are measured in amperes (A), hence the name. For direct measurement, the ammeter is connected in series with the circuit in which the current is to be measured. An ammeter usually has low resistance so that it does not cause a significant voltage drop in the circuit being measured.