1 Answer
No, reactance is not present in a DC circuit. Reactance refers to the opposition to the flow of alternating current (AC) caused by inductance and capacitance.
In a DC circuit, the opposition to current flow is purely due to resistance, not reactance. Reactance only becomes relevant in AC circuits where the frequency of the current plays a role in the behavior of inductors and capacitors.
- Inductive reactance (XL) occurs due to inductors and depends on the frequency of the AC. In a DC circuit, the frequency is zero, so the inductive reactance is effectively zero after any initial transient response.
- Capacitive reactance (XC) occurs due to capacitors and also depends on the frequency. In a DC circuit, once the capacitor is fully charged, it acts like an open circuit, so capacitive reactance doesn't have any effect.
In a DC circuit, the opposition to current flow is purely due to resistance, not reactance. Reactance only becomes relevant in AC circuits where the frequency of the current plays a role in the behavior of inductors and capacitors.