Farad

In physics, more particulary in electromagnetism, the farad (F) is the SI unit of capacitance,

\begin{align} 1\; \mathrm{F} &= 1\; \mathrm{C\; V}^{-1} \\ &= 1\; \mathrm{C^2\; J}^{-1} \\ &= 1\; \mathrm{C^2\; N^{-1}\;m^{-1}}, \\ \end{align} $$ where C is coulomb, V is  volt, J is joule,  N is  newton, and m is meter. A farad is a huge capacitance, so more usual practical units are the microfarad (10&minus;6 F) nanofarad (10&minus;9 F), and picofarad (10&minus;12 F).

The unit is named in honor of Michael Faraday.