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The ampere (/ ˈ æ m p ɛər / AM-pair, US: / ˈ æ m p ɪər / AM-peer; symbol: A), often shortened to amp, is the unit of electric current in the International System of Units (SI). One ampere is equal to 1 coulomb (C) moving past a point per second.
Ampere is the SI unit of electric current, named after French physicist André-Marie Ampère. Learn how it is defined, how it relates to other units of measurement, and how it has changed over time.
- The Editors of Encyclopaedia Britannica
Learn what ampere is, how to convert it, how to calculate it and how to measure it with an ammeter. Find out the unit prefixes, formulas, examples and types of ammeter for electric current.
- 6 min
- Ampere meter, commonly known as Ammeter is an electrical instrument used to measure electrical current in Amperes.
- Yes, the value of ampere can be negative.
- Ampere is required to quantify the current flowing in a system.
- When an ammeter is connected in parallel it becomes a short circuit path allowing all the current to flow through it which maybe lead to the burnin...
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May 15, 2018 · Learn about the ampere, the SI unit of electric current, and how it was redefined in 2019 based on the elementary charge of an electron. Find out how the ampere is measured, used and related to other SI units.
Ampere is the standard unit of measurement for the strength of an electric current. Learn how to use the word ampere in physics and other contexts, and see related terms and synonyms.
The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 x 10 –19 when expressed in the unit C, which is equal to A s, where the second is defined in terms of Δν Cs.
