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Question 254

What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 25 ohms, R is 100 ohms, and XL is 75 ohms?

  1. 27 degrees with the voltage lagging the current
  2. 27 degrees with the voltage leading the currentBonne réponse
  3. 63 degrees with the voltage lagging the current
  4. 63 degrees with the voltage leading the current

Explication

Here the inductive reactance exceeds the capacitive reactance, leaving a net reactance of +50 Ω, so the circuit is inductive. The arctangent of 50/100 is about 27°, and in an inductive circuit the voltage leads the current.

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Question 254: What is the phase angle between the voltage across and the… · FCC Amateur Extra Class (Element 4) · Questena