The coulomb (symbol: C) is the unit of electric charge in the International System of Units (SI). It is defined to be equal to the electric charge delivered by a 1 ampere current in 1 second, with the elementary charge e as a defining constant in the SI.
A coulomb is the standard unit used to measure the amount of electric charge, similar to how a kilogram measures weight. It's defined as the amount of charge that flows when an electric current of 1 ampere runs for 1 second, making it essential for quantifying and calculating electricity in science and engineering.
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The coulomb (symbol: C) is the unit of electric charge in the International System of Units (SI). It is defined to be equal to the electric charge delivered by a 1 ampere current in 1 second, with the elementary charge e as a defining constant in the SI.
== Definition == The SI defines the coulomb as "the quantity of electricity carried in 1 second by a current of 1 ampere" by fixing the value of the elementary charge, . Inverting the relationship, the coulomb can be expressed in terms of the elementary charge: 1 ~ \mathrm{C} = \frac{e}{1.602\,176\,634 \times 10^{-19}} \approx 6.241509\times 10^{18} ~ e .
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