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Series RLC resonance

Sweep frequency to locate maximum current and examine the phase at resonance.

    E14 · Series RLC resonance0.00 s · Ready

    Electronics · AC and power / Principles and inquiry

    Series RLC resonance experiment guide

    Sweep frequency to locate maximum current and examine the phase at resonance.

    How does it work?

    At resonance inductive and capacitive reactance cancel and current is maximal.

    Key relationship

    Z = R + j(ωL−1/(ωC)) · f₀ = 1/(2π√LC)

    Try this investigation

    1. Sweep frequency to locate maximum current and examine the phase at resonance.
    2. Run and record each of the three baseline presets.
    3. Compare the changed variable and its result with the baseline records.

    Interpreting your results

    At resonance, what is the RMS current for a 6 V RMS input and 20 Ω resistance?

    0.3 A

    Assumptions and limitations

    Only steady state of ideal lumped elements is modeled. Coil losses and parasitic effects are omitted. Experiment on screen; do not reproduce this with real power supplies, outlets or high voltage.