What is the unit of capacitance?

The unit of capacitance is the Farad. Capacitance measures a capacitor's ability to store electrical charge per unit voltage across its plates. Specifically, one Farad is defined as the ability to store one coulomb of charge at one volt. This relationship highlights how capacitance is fundamentally tied to the physical characteristics of the capacitor—such as the surface area of the plates, the distance between them, and the type of insulating material (dielectric) used.

Understanding this concept is essential because it helps in analyzing circuits where capacitors play a crucial role in energy storage, filtering, and timing applications. The other units listed—Ohm, Volt, and Watt—pertain to resistance, electric potential, and power, respectively, and do not measure capacitance. Hence, Farad is the correct and precise unit for capacitance.