What is a coil and a capacitor connected in series or parallel commonly referred to?

A coil (inductor) and a capacitor connected in series or parallel are commonly referred to as a tuned circuit. This type of circuit is designed to select specific frequencies in the presence of others, commonly used in radio frequency applications.

When a coil and capacitor are used together, they can create a resonant frequency, which is the frequency at which the inductive reactance of the coil and the capacitive reactance of the capacitor are equal in magnitude but opposite in phase. At this resonant frequency, the circuit can effectively filter or emphasize specific signals, making it particularly useful for radio transmitters and receivers, as well as in oscillators and filters.

The term tuned circuit specifically highlights its ability to “tune” into a particular frequency, providing that selectivity and resonance. This makes it distinct and more appropriate than the other options presented. For instance, while resonant circuit could be a potential term, it is less specific than tuned circuit as it lacks the explicit focus on the frequency selection capability of the setup. Coupled circuit typically refers to interactions between circuits rather than the individual circuit behavior defined here. Lastly, inductive circuit typically emphasizes circuits dominated by inductive elements without highlighting the frequency-tuning aspect that a combination of inductance and