An LC circuit, also known as a resonant circuit, consists of an inductor L and a capacitor C connected together. This circuit can store energy oscillating between the magnetic field of the inductor and the electric field of the capacitor. The frequency at which this oscillation occurs is determined by the values of the inductor and capacitor. When the LC circuit is energized, it can create oscillations of current and voltage. These oscillations can be used in various applications, such as in radio transmitters and receivers, where they help select specific frequencies for communication. The behavior of LC circuits is fundamental in electronics and signal processing.