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Pregunta 210

What happens when inductive and capacitive reactance are equal in a series LC circuit?

  1. Resonance causes impedance to be very high
  2. Impedance is equal to the geometric mean of the inductance and capacitance
  3. Resonance causes impedance to be very lowRespuesta correcta
  4. Impedance is equal to the arithmetic mean of the inductance and capacitance

Explicación

Inductive and capacitive reactance are opposite in sign, so when they are equal in magnitude they cancel and only the small series resistance remains, making impedance a minimum and current a maximum. Very high impedance at resonance describes a parallel LC circuit, not a series one.

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Pregunta 210: What happens when inductive and capacitive reactance are… · FCC General Class (Element 3) · Questena