sekundaarikäämistä

Sekundaarikäämi, often translated as secondary coil, is a fundamental component in electromagnetic induction, most commonly found in transformers. It is a coil of wire that is inductively coupled to a primary coil. When an alternating current flows through the primary coil, it generates a changing magnetic field. This changing magnetic field passes through the secondary coil, inducing an alternating voltage across its terminals.

The voltage induced in the secondary coil is directly proportional to the ratio of the number of turns in the secondary coil to the number of turns in the primary coil, and the voltage applied to the primary coil. This principle allows transformers to step up or step down voltage, making them essential for power distribution systems, electronics, and various other applications. The physical construction of a secondary coil typically involves winding insulated wire around a core, which can be made of ferromagnetic material or air, depending on the transformer's design and purpose. The properties of the secondary coil, such as its inductance and resistance, are critical to the overall performance and efficiency of the inductive device it is part of.