Answer:
The quantity of electric charge can be directly measured with an electrometer, or indirectly measured with a ballistic galvanometer. The amount of charge in 1 electron (elementary charge) is defined as a fundamental constant in the SI system of units, (effective from 20 May 2019)
Explanation:
Other units: elementary charge; faraday; ampere hour
SI unit: coulomb
In SI base units: C = A⋅s
