What unit measures the ability to store electrical charge in a circuit?

The unit that measures the ability to store electrical charge in a circuit is the Farad (F). In electrical engineering, capacitance is defined as the ability of a system to store an electric charge, and the Farad is the standard unit of measurement for this property. When a capacitor is charged, it stores energy in the electric field created between its plates, and this ability to hold charge is quantified in Farads. A capacitor with a capacitance of one Farad can store one coulomb of charge at one volt.

Understanding capacitance is crucial for designing circuits, especially in applications where energy storage is necessary, such as in power supplies, filters, and timing applications. The other units mentioned in the choices are related to different electrical properties: Hertz measures frequency, Ohms measure resistance, and Henries measure inductance. Therefore, the clarity in the function of each unit highlights why the correct focus on Farads is essential for the topic of storing electrical charge.