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.
Instruments used to measure smaller currents, in the milliampere or microampere range, are designated as milliammeters or microammeters. Early ammeters were laboratory instruments that relied on the Earth's magnetic field for operation. By the late 19th century, improved instruments were designed which could be mounted in any position and allowed accurate measurements in electric power systems. It is generally represented by letter 'A' in a circuit.
Ammeter from the University of Dundee Physics Department
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...
Nicholas Ammeter (born 11 December 2000) is a Swiss footballer who plays as a goalkeeper for Las Vegas Lights in the USL Championship. Ammeter started...
meter with integral AC current clamp is known as a clamp meter, clamp-on ammeter, tong tester, or colloquially as an amp clamp. A clamp meter measures the...
A mirror galvanometer is an ammeter that indicates it has sensed an electric current by deflecting a light beam with a mirror. The beam of light projected...
can be modified by adding a prefix that multiplies it by a power of 10. Ammeter Ampacity (current-carrying capacity) Electric current Electric shock Hydraulic...
current is also known as amperage and is measured using a device called an ammeter.: 788 Electric currents create magnetic forces, which are used in motors...
Alternatively, an ammeter may be fitted. This indicates whether the battery is being charged or discharged. In the adjacent picture, the ammeter is marked "Alternator"...
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an ammeter, a voltmeter, a multimeter, etc. The ammeter is used in series with the load, so the same current flows through the load and the ammeter. The...
dimensions are constrained by a ceramic substrate.[citation needed] An ammeter shunt is a special type of current-sensing resistor, having four terminals...
gear New car price included the following items: tools jack speedometer ammeter electric horn ignition theft lock automatic windshield cleaner demountable...
r m s {\displaystyle I_{rms}} is the rms current measured by an ideal ammeter, and V r m s {\displaystyle V_{rms}} is the rms voltage measured by an...
Manganin foil and wire is used in the manufacture of resistors, particularly ammeter shunts, because of its virtually zero temperature coefficient of resistance...
passive electromechanical device, namely a 200 μA DC d'Arsonval movement ammeter fed from a full-wave copper-oxide rectifier mounted within the meter case...
dimensions are constrained by a ceramic substrate.[citation needed] An ammeter shunt is a special type of current-sensing resistor, having four terminals...
and current, in which case can be used as a voltmeter, ohmmeter, and ammeter. Some feature the measurement of additional properties such as temperature...
States and the Philippines which use meter. Measuring devices (such as ammeter, speedometer) are spelled "-meter" in all variants of English. The suffix...
the body was more rounded. Standard equipment included a speedometer, an ammeter, a tool kit, and a headlight dimmer. Optional items included things like...
transformer inductively couples antenna of AM radio station to transmitter clamp ammeter measuring current by inductive coupling Utility transformer cutaway shows...
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