Ammeter Collection

An early galvanometer, a type of ammeter, a measuring instrument used to measure
2619091 An early galvanometer, a type of ammeter, a measuring instrument used to measure the electric current in a circuit, from Les Merveilles de la Science

Electricity in therapeutics (b / w photo)
6013721 Electricity in therapeutics (b/w photo) by English Photographer, (20th century); Private Collection; (add.info.: Electricity in therapeutics)

William Edward Ayrton (1847-1908), British physicist, electrical engineer and inventor, 1892. Ayrton studied under Lord Kelvin at Glasgow

Illustration of ammeter

Resistance test, battery, resistor and ammeter

Experiment showing effect of electromagnetism on compass needle, using ammeter, battery, variable resistor, compass, wires

Electrical circuit with ammeter and voltmeter illutrating Ohms Law, a thin wire has a resistance to the flow of current

Lightbulb attached to ammeter

Ammeter and voltmeter, front view

Multimeter. A multimeter is a combined digital ammeter and voltmeter. From these it can also derive resistance. An ammeter measures the number of amperes (electric current) in a circuit

Ammeter and voltage multiplier. Analogue ammeter (right) used for measuring the electric current in a circuit, displaying it in amperes

Ammeter. Analogue ammeter used for measuring the electric current in a circuit, displaying it in amperes. Current is conserved throughout a circuit but splits at junctions

Electrical equipment. Digital ammeter (left, yellow), digital voltmeter (right, yellow) and an oscilloscope. An ammeter measures the number of amperes (electric current) in a circuit

Electric circuit. Capacitor (blue, lower centre) connected to an alternating current (AC) power supply (orange, left). This type of supply operates with the electrical current flowing back

Digital multimeter. This device is a combined digital ammeter and voltmeter. From these it can also derive resistance. An ammeter measures the number of amperes (electric current) in a circuit

Measuring electric current. Circuit diagram showing the arrangement of equipment used to measure electric current flowing through a component. The components are represented by standard symbols

Rheostat controlling current
Rheostat varying current in a circuit. A Rheostat (lower right), also known as a variable resistor, has a resistance which can be altered

Sergey Vavilov, Soviet physicist
Sergey Ivanovich Vavilov (1891-1951), Soviet physicist, in a laboratory at the Physics Institute. Vavilovs work in optics included his co-discovery of the Vavilov-Cherenkov effect

Simple electrical circuit. This circuit consists of a bulb (centre right) connected to a power supply (top left). A voltmeter (bottom left)

Ayrton and Perry
Portrait engravings of Professor William Ayrton and Professor John Perry, electrical engineers. Ayrton held the post of Professor of Natural Philosophy

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An ammeter, an early galvanometer and a type of measuring instrument used to measure electricity in therapeutics. This captivating black and white photo showcases William Edward Ayrton, a renowned British physicist, electrical engineer, and inventor in 1892. Another image from around the same time period features Ayrton himself with his invention. An illustration of the it is included, giving us a glimpse into its design. The ammeter's versatility is demonstrated through various experiments such as resistance tests using batteries, resistors, and the ammeter itself. In one experiment, electromagnetism's effect on a compass needle is shown by utilizing the battery, variable resistor, compass, wires along with the trusty ammeter. Ohm's Law comes alive in an electrical circuit diagram featuring both an ammeter and voltmeter; here we see how thin wires can impede current flow due to their resistance. Furthermore, this device proves useful even when connected to lightbulbs for measurement purposes. From different angles like front view or within a multimeter setup - the ever-reliable ammeter continues to play its role efficiently in understanding and analyzing electric currents.