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Electrical Engineering

Rlc Circuits And Resonance MCQs

Practice Rlc Circuits And Resonance MCQs for competitive exams.

Rlc Circuits And Resonance MCQs

Practice questions from this topic.

The impedance at the resonant frequency of a series RLC circuit with L = 20 mH, C = 0.02 µF, and RW = 90 Ω is

  1. A. 0 Ω
  2. B. 90 Ω
  3. C. 20 Ω
  4. D. 40 Ω
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A 6.8 kΩ resistor, a 7 mH coil, and a 0.02 µF capacitor are in parallel across a 17 kHz ac source. The coil's internal resistance, R W , is 30 Ω. The equivalent parallel resistance, R p (eq), is

  1. A. 1,878 Ω
  2. B. 18,780 Ω
  3. C. 18,750 Ω
  4. D. 626 Ω
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A certain series resonant circuit has a bandwidth of 2 kHz. If the existing coil is replaced with one having a higher value of Q, the bandwidth will

  1. A. Increase
  2. B. Remain the same
  3. C. Decrease
  4. D. Be less selective
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A lower Q produces a narrower bandwidth.

  1. A. True
  2. B. False
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If the value of C in a series RLC circuit is decreased, the resonant frequency increases

  1. A. True
  2. B. False
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Resonance is a condition in a series RLC circuit in which the capacitive and inductive reactances are equal in magnitude.

  1. A. True
  2. B. False
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