toisiokäämi

Toisiokäämi, often translated as secondary coil, is a fundamental component in inductive coupling and transformers. It is an electrical conductor, typically a coil of wire, that works in conjunction with a primary coil. The interaction between these coils is based on the principle of electromagnetic induction. When an alternating current flows through the primary coil, it generates a fluctuating magnetic field. This changing magnetic field then permeates the area around the secondary coil. According to Faraday's law of induction, a changing magnetic flux through a coil induces an electromotive force (voltage) across its ends. Therefore, the fluctuating magnetic field produced by the primary coil induces a voltage in the secondary coil.

The relationship between the voltage induced in the secondary coil and the voltage applied to the primary coil is determined by the turns ratio, which is the ratio of the number of turns in the secondary coil to the number of turns in the primary coil. In a transformer, if the secondary coil has more turns than the primary coil, the induced voltage will be higher (a step-up transformer). Conversely, if the secondary coil has fewer turns, the induced voltage will be lower (a step-down transformer). This ability to transform voltage levels makes toisiokäämi and its primary counterpart essential in power distribution, electronics, and various wireless power transfer applications. The physical arrangement and proximity of the coils significantly influence the efficiency of energy transfer between them.