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Inductance

refers to the ability of a device to store energy in the form of a magnetic field. Cables have a certain inductance per foot. In its simplest form, an inductor consists of a wire loop or coil. The standard unit of inductance is the henry, abbreviated H. This is a large unit. More common units are the microhenry, abbreviated µH (1 µH =10-6 H) and the millihenry, abbreviated mH (1 mH =10-3 H). Occasionally, the nanohenry (nH) is used (1 nH = 10-9 H). The reactance of an inductor increases as frequency increases.
XL = 2πfL, where XL = inductive reactance

f = frequency and L = inductance