Resonant frequency is the natural frequency at which an LC circuit oscillates. At this frequency, the inductive and capacitive reactances are equal, causing the circuit to appear purely resistive. The energy alternately stores in the inductor's magnetic field and the capacitor's electric field.
⚠Resonance requires both L and C. Ideal LC (no R) oscillates forever. Real circuits have resistance that damps the oscillation. Higher Q = sharper resonance = less damping.
Understanding Resonance
Resonance occurs when the energy stored in the inductor equals the energy stored in the capacitor each cycle. At this point, the circuit offers minimum opposition (series) or maximum opposition (parallel) to current flow. The resonant frequency depends only on the product LC, not on resistance.
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