Since the farad is a very large unit, values of capacitors are usually expressed in microfarads (μF), nanofarads (nF), or picofarads (pF). Multiples higher than the microfarad are rarely used in practice, even for large capacitances, so that a capacitance of 4.7×10-3 F, for example, is usually written as 4700 μF.
The farad should not be confused with the faraday, an old unit of charge nowadays superseded by the coulomb.
The reciprocal of capacitance is called elastance, the (non-standard, non-SI) unit of which is the daraf.
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