An RLC circuit can be either
AC (Alternating Current) or
DC (Direct Current), depending on how it is powered.
- RLC Circuit with AC (Alternating Current):
When an RLC circuit is powered by an AC source (like a sinusoidal voltage), it is typically referred to as an
AC RLC circuit. In this case, the current continuously changes direction, and the resistive, inductive, and capacitive components behave differently depending on the frequency of the AC signal. The impedance of the circuit changes with the frequency of the AC.
- RLC Circuit with DC (Direct Current):
If the circuit is powered by a DC source (like a battery), the behavior is different. Initially, when the DC voltage is applied, the inductor resists changes in current, and the capacitor will charge up. After some time, the inductor will act like a short circuit (resisting no current), and the capacitor will act like an open circuit (no current will flow through it). The circuit will eventually reach a steady state.
In short:
- AC RLC Circuit: AC voltage, varying current and reactance.
- DC RLC Circuit: DC voltage, initial charging behavior, and eventually a steady current.
