instruction: What is an LCR circuit?
output: An LCR circuit is a resonant circuit that is also often called an RLC circuit. It consist of an inductor (L), a capacitor (C), and a resistor (R). The three components may be connected in series or in parallel.
  
  Radio and television receivers contain oscillators that are based on the LCR circuit. The circuit is used to tune into transmitting stations.