What is the unit of electric charge?

The unit of electric charge is the coulomb. This unit is defined as the amount of charge transferred by a current of one ampere in one second. The coulomb is a fundamental unit in the International System of Units (SI) and is vital in understanding electrical systems and concepts.

Each of the other options represents different electrical quantities. The volt is a unit of electric potential, indicating how much potential energy exists to move electric charge. Ohm measures electrical resistance, which reflects how strongly a material opposes the flow of electric current. The watt, on the other hand, is a unit of power that indicates the rate of energy transfer or conversion. Therefore, the correct identification of coulomb as the unit of electric charge establishes a clear understanding of basic electrical concepts and their relationships in circuits.