# What is the SI unit of electric charge?

Apr 20, 2018

The S.I unit is the Coulomb (C)

#### Explanation:

It is approximately $6.242 \cdot {10}^{18}$ e (e being the charge of a proton)

Apr 20, 2018

The SI unit of quantity of electric charge is the coulomb.

#### Explanation:

The coulomb, $\text{C}$, is derived from the fundamental SI unit of time, the second, $\text{s}$, and the fundamental SI unit of electric current, the ampere, $\text{A}$. It is the charge $\left(\text{Q or q}\right)$ transported by a constant current of one ampere in one second.
$\text{1 C"="1A"*"s}$

A coulomb is equivalent to the charge of approximately $6.242 \times {10}^{18}$ protons, or 1.036xx10^(−5) mol of protons. Each proton has an elementary charge of $+ 1 e$.

https://en.wikipedia.org/wiki/Coulomb