One farad is defined as?

One farad is defined as the capacitance of a capacitor that stores one coulomb of electric charge when a potential difference of one volt is applied across its terminals. This definition captures the relationship between capacitance (measured in farads), charge (measured in coulombs), and voltage (measured in volts).

The concept can be understood through the fundamental relationship in capacitance, which states that capacitance (C) is equal to the charge (Q) stored by the capacitor divided by the voltage (V) across it. Mathematically, this is expressed as ( C = \frac{Q}{V} ). Hence, if a capacitor has a capacitance of one farad, it will hold one coulomb of charge when the voltage across it is one volt. This clear and direct definition is crucial for understanding the foundational principles of electrical and electronic circuits.

The other options diverge from this precise definition, either misrepresenting units or failing to accurately capture the relationship between charge and voltage that defines a farad.