When referring to the inductors, it is worth mentioning that the important designation ¨induct¨ is based on the physical quantity, directly associated to them, being represented by the letter L, measured in Henry, and referred to graphically by a helical wire. That is, it can be said that this is a kind of parameter of the linear circuits, whose function is to relate the voltage induced by a variable magnetic field to the dominant current in the field.

The voltage across all the terminals of an inductor is automatically proportional to the rate of change of the current flowing through it. Thus, it can be said that the letter u consists of instantaneous voltage, its unit of measurement being volt. The letter l is basically the inductance, having the unit of measure as Henry. The letter i is fundamentally the instantaneous current, having as unit of measure the ampere, and finally the letter t which consists of time.

In the case of electrical circuits, the component called inductor is capable of resisting only significant current changes. It is worth emphasizing that for an inductor to be considered ideal, it should not offer resistance to direct current, except in case the current is switched on and off, undergoing a gradual change.