ammeter

Also known as ampere metre, ampere meter, ampere-meter

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.

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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Commons category: Ammeters

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15 sections

Contents

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.