LCkredsløb

LCkredsløb refers to an electrical circuit containing an inductor (L) and a capacitor (C) connected in series or parallel. This combination forms a resonant circuit, capable of oscillating at a specific natural frequency. When an alternating current (AC) voltage is applied to an LC circuit, energy is exchanged between the inductor's magnetic field and the capacitor's electric field. This exchange causes the circuit to oscillate.

The natural resonant frequency of an ideal LC circuit is determined by the values of the inductance (L) and capacitance (C) according to the formula f = 1 / (2π√(LC)), where f is the frequency in Hertz, L is the inductance in Henries, and C is the capacitance in Farads. At this resonant frequency, the impedance of a series LC circuit is minimal, while the impedance of a parallel LC circuit is maximal.

LC circuits are fundamental components in many electronic applications. They are widely used in radio tuning circuits, allowing receivers to select specific broadcast frequencies. They also play a role in filters, oscillators, and switching power supplies. The ability to resonate at a particular frequency makes them essential for manipulating and processing signals in various electronic systems. Real-world LC circuits also include resistance, which leads to damped oscillations and energy loss.