14 Facts About LC circuit

An LC circuit, called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter L, and a capacitor, represented by the letter C, connected together.

The LC circuit can act as an electrical resonator, an electrical analogue of a tuning fork, storing energy oscillating at the LC circuit's resonant frequency.

An LC circuit is an idealized model since it assumes there is no dissipation of energy due to resistance.

The purpose of an LC circuit is usually to oscillate with minimal damping, so the resistance is made as low as possible.

Two-element LC circuit described above is the simplest type of inductor-capacitor network .

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In most applications the tuned LC circuit is part of a larger LC circuit which applies alternating current to it, driving continuous oscillations.

Resonance occurs when an LC circuit is driven from an external source at an angular frequency at which the inductive and capacitive reactances are equal in magnitude.

Resonance effect of the LC circuit has many important applications in signal processing and communications systems.

The current into the positive terminal of the LC circuit is equal to the current through both the capacitor and the inductor.

Therefore the series LC circuit, when connected in series with a load, will act as a band-pass filter having zero impedance at the resonant frequency of the LC circuit.

The total current flowing into the positive terminal of the LC circuit is equal to the sum of the current flowing through the inductor and the current flowing through the capacitor:.

LC circuit found that when a Leyden jar was discharged through a wire wound around an iron needle, sometimes the needle was left magnetized in one direction and sometimes in the opposite direction.

LC circuit correctly deduced that this was caused by a damped oscillating discharge current in the wire, which reversed the magnetization of the needle back and forth until it was too small to have an effect, leaving the needle magnetized in a random direction.

LC circuit placed two resonant circuits next to each other, each consisting of a Leyden jar connected to an adjustable one-turn coil with a spark gap.