What is the unit of electric charge?

The unit of electric charge is the coulomb. This unit is defined as the amount of charge that is transferred by a steady current of one ampere in one second. In practical terms, the coulomb is a fundamental unit in electricity and is critical for understanding how electric charge is measured and conveyed in various systems. The concept of electric charge is integral in circuits, capacitors, and even in discussions about atomic structure, where electrons (which carry a negative charge) are considered.

The other choices represent different physical quantities: the volt is the unit of electric potential or voltage, indicating the work done to move a charge; the watt is the unit of power, representing the rate at which energy is used or produced; and the ohm is the unit of resistance, describing how much a material opposes the flow of electric current. Each of these units plays a vital role in the study of electricity but does not pertain to the measurement of electric charge itself.