picofarad

Capacitance ranges from picofarad to more than hundreds of farad.

Its subdivisions were invariably used, namely the microfarad, nanofarad and picofarad.

A micro-microfarad (μμF), an obsolete unit sometimes found in older texts, is the equivalent of a picofarad.

Active probes are commonly seen by the circuit under test as a capacitance of 1 picofarad or less in parallel with 1 megohm resistance.

The prefix for this number is pico, and is abbreviated as "p" (for example, in electronics, one picofarad would be written as 1 pF).

When speaking of capacitor values a picofarad is sometimes referred to as a "puff" or "pic", as in "a ten puff capacitor".

Current density is measured in pA pF (picoamperes per picofarad), that is, current divided by capacitance, a de facto measure of membrane area.

One picofarad is about the smallest value of capacitor available for general use in electronic design, since smaller capacitors would be dominated by the parasitic capacitances (stray capacitance) of other components, wiring or printed circuit boards.