In electrical theory, how is charge measured?

Charge is measured in coulombs, which is the standard unit of electric charge in the International System of Units (SI). One coulomb is defined as the amount of charge transported by a constant current of one ampere in one second. This fundamental concept highlights how charge flows in circuits, emphasizing the relationship between current, time, and charge.

Other units mentioned relate to different electrical properties: Joules measure energy, Volts measure electric potential, and Amperes measure the flow of electric current. Each of these units is crucial in the field of electrical theory but serve distinct purposes that do not directly quantify electric charge like coulombs do. Thus, understanding that charge is quantified in coulombs is essential for grasping the fundamental principles of electricity and circuits.