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ampere |
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ampere (ăm`pēr), abbr. amp or A, basic unit of electric current. It is the fundamental electrical unit used with the mks system mks system, system of units of measurement based on the metric system and having the meter of length, the kilogram of mass, and the second of time as its fundamental units. ..... Click the link for more information. of units of the metric system metric system, system of weights and measures planned in France and adopted there in 1799; it has since been adopted by most of the technologically developed countries of the world. ..... Click the link for more information. . The ampere is officially defined as the current in a pair of equally long, parallel, straight wires 1 meter apart that produces a force of 0.0000002 newton (2 × 10−7 N) between the wires for each meter of their length. Current meters such as ammeters and galvanometers are calibrated in reference to a current balance that actually measures the force between two wires. A measurement of electrical current in a circuit, commonly called an "amp." Contrast with "volts," which is a measure of force, or pressure, behind the current. Multiplying amps times volts derives "watts," the total measurement of power. In electrical equations such as Ohm's Law, the symbol for ampere is "I" (see Ohm's Law).
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| The switch consumes power from the battery, however the current drain, 16 microamperes, is far too low to be of concern. Power consumption in the Active operating mode is as low as 900 microamperes (typical, at 1. Carpal tunnel syndrome pain treated with low-level laser and microamperes transcutaneous electric nerve stimulation: a controlled study. |
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microampere
