An LCR circuit, also known as an RLC circuit, consists of an inductor, a capacitor, and a resistor, and can be configured in series or parallel. It is widely used in electronics for applications like filtering and tuning, with resonance occurring when inductive reactance equals capacitive reactance. The document outlines the components, resonance conditions, and practical applications of LCR circuits.

1. LCR Circuit
An Overview of Inductor-Capacitor-
Resistor Circuits

2. What is an LCR Circuit?
• An LCR circuit, also known as an RLC circuit, is an
electrical circuit consisting of:
• - Inductor (L)
• - Capacitor (C)
• - Resistor (R)
• The circuit can be connected in series or parallel
configurations and is widely used in electronics for
filtering, tuning, and oscillations.

3. Components of an LCR Circuit
• 1. Inductor (L):
• - Stores energy in a magnetic field.
• - Impedance is proportional to frequency (ωL).
• 2. Capacitor (C):
• - Stores energy in an electric field.
• - Impedance decreases with frequency (1/ωC).
• 3. Resistor (R):
• - Dissipates energy as heat.
• - Impedance is independent of frequency.

4. Resonance in LCR Circuit
• Resonance occurs when the inductive reactance
equals the capacitive reactance:
• ωL = 1/ωC
• Resonant Frequency (f₀):
• f₀ = 1 / (2π√(LC))
• At resonance:
• - Impedance is minimum (for series circuit).
• - Current is maximum.

5. Applications of LCR Circuit
• - Radio tuning circuits.
• - Frequency selective filters.
• - Oscillators and signal processing.
• - Power supply design.
• - Automotive ignition systems.

6. Insert a schematic diagram showing an LCR circuit in series or parallel configuration.
Label the components and indicate the input voltage and output points.