Bandwidth in an AC circuit refers to the range of frequencies over which the circuit can effectively operate. It is typically defined as the difference between the upper and lower frequency limits where the circuit's performance remains within acceptable levels.
Resonant Frequency: The frequency at which an AC circuit's impedance is at a minimum and current reaches its maximum.
Quality Factor (Q): A dimensionless parameter that describes how underdamped an oscillator or resonator is, related to its bandwidth.
Half-Power Points: Frequencies at which power drops to half of its peak value; used to determine bandwidth.