A farad is a unit of measurement used in electronics. It is used for capacitance, which is the ability to store electric charge. The unit is named after the English physicist Michael Faraday.Typical devices in electronics have capacitances ranging from microfarads to picofarads. Some supercapacitors have more than one farad.
One farad is defined as the capacitance across which, when charged with one coulomb, there is a potential difference of one volt. Equally, one farad can be described as the capacitance which stores a one-coulomb charge across a potential difference of one volt.