What is the SI unit of Electrical Charge?
Electric charge charged particles, and how their interactions are mediated by photons, is called quantum electrodynamics. The SI derived unit of electric charge is the coulomb (C) named after French physicist Charles-Augustin de Coulomb. In electrical engineering, it is also common to use the ampere-hour (Ah); in physics and chemistry, it is common to use the elementary charge ("e" as a unit). Chemistry also uses the Faraday constant as the charge on a mole of electrons. The symbol "Q" often denotes charge. Charge is the fundamental property of forms of matter that exhibit electrostatic attraction or repulsion in the presence of other
Conventional electrical unit Conventional electrical unit A conventional electrical unit (or conventional unit where there is no risk of ambiguity) is a unit of measurement in the field of electricity which is based on the so-called "conventional values" of the Josephson constant and the von Klitzing constant agreed by the International Committee for Weights and Measures (CIPM) in 1988. These units are very similar in scale to their corresponding SI units, but are not identical because of their different definition. They are distinguished from the corresponding SI units by setting the symbol in italic typeface and adding a subscript "90" – e.g., the