induktiokäämejä

Induktiokäämi, often referred to as a coil or reactor, is a passive electrical component that stores energy in a magnetic field when electric current flows through it. It is typically constructed by winding a length of conductive wire, often copper, around a core. The core can be made of various materials, including air, iron, or ferrite, which influences the coil's inductance. Inductance is the measure of a coil's ability to store magnetic energy, and it is quantified in henries (H).

The fundamental principle behind an induktiokäämi is Faraday's law of induction. When the current through the coil changes, the magnetic field it generates also changes. This changing magnetic field induces a voltage across the coil, opposing the change in current. This property is known as self-inductance. Inductors are crucial components in many electronic circuits. They are used for filtering, tuning, energy storage, and in transformers for voltage conversion. In AC circuits, inductors exhibit impedance, which is their opposition to the flow of alternating current. This impedance is dependent on the frequency of the AC signal and the coil's inductance.