ühepooluselised

"Ühepooluselised" is an Estonian term that translates to "unipolar" in English. This term is primarily used in a scientific context, particularly in physics and engineering, to describe devices or phenomena that exhibit a single polarity. In electronics, a unipolar transistor is a type of field-effect transistor where the current conduction is achieved by only one type of charge carrier, either electrons or holes, but not both. This is in contrast to bipolar transistors, which utilize both electrons and holes for conduction.

The concept of unipolarity can also be applied to magnetic fields. A hypothetical unipolar magnet would possess only one magnetic pole, either north or south, which is a theoretical construct as all known magnets in nature are dipolar, having both a north and a south pole. In some specialized applications, like the unipolar motor, the term refers to a simpler design that operates using a single magnetic pole. The term "unipolar" signifies the absence of a contrasting or opposite pole within the defined system or device.