Unit fA
Name femtoampere
Category Electric Current
Details A femtoampere (fA) is a unit of electric current in the International System of Units (SI) and is equal to 10^-15 amperes. The prefix "femto" means that it is one quadrillionth, or a thousand trillionth, of an ampere. In the field of electric current, a femtoampere is an extremely small current, typically used in the measurement of currents at the levels of individual electrons or in low-current applications, such as nanotechnology and precision scientific instrumentation. It is especially relevant where very small electric currents need to be measured or controlled, like in high-impedance circuits and sensitive devices.