Electrical charge Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. The SI derived unit of electric charge is the coulomb (C), although in electrical engineering it is also common to use the ampere-hour (Ah), and in chemistry it is common to use the elementary charge (e) as a unit. The symbol Q is often used to denote charge. [Wikipedia: https://en.wikipedia.org/wiki/Electric_charge] Electricity and Magnetism QUDT http://qudt.org/vocab/quantity#ElectricCharge ODM2 Units Type Controlled Vocabulary ODM2 Working Group A vocabulary for describing the type of the Unit or the more general quantity that the Unit represents.