The farad is the SI unit of capacitance (named after Michael Faraday). A capacitor has a value of one farad when one coulomb of charge causes a potential difference of one volt across it.
Its dimensions in SI units are C·V-1 = m-2·kg-1·s4·A2.
Since the farad is a very large unit, values of capacitors are usually expressed in microfarads (μF), nanofarads (nF), or picofarads (pF).
The daraf is the unit of elastance, which is the reciprocal of capacitance.
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