AT&T Technical Knowledge (TKT) II Practice Test 2025 – Complete Exam Prep

The unit used to measure capacitance is the Farad. Capacitance is a measure of a capacitor's ability to store electrical charge. One Farad is defined as the amount of capacitance that can hold one coulomb of charge at a potential difference of one volt. This relationship underscores the fundamental nature of capacitors in circuits, where they are critical for energy storage and filtering applications.

Understanding capacitance in terms of the Farad is essential for many electrical engineering applications, including timing circuits and power conditioning, where the ability to store and release energy efficiently is crucial. The Farad can also be represented in smaller units, such as microfarads or nanofarads, which are more commonly used due to the large size of a Farad in practical circuits. In contrast, the other units listed—Ohm, Watt, and Voltage—measure different physical properties: resistance, power, and electric potential, respectively.