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Electrical Engineering

Passive Filters MCQs

Practice Passive Filters MCQs for competitive exams.

Passive Filters MCQs

Practice questions from this topic.

A parallel resonant band-pass filter consists of a 6.8 Ω resistor in series with a parallel network made up of an 8 µH coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume RW = 0 Ω. What is the center frequency of the filter?

  1. A. 5.14 MHz
  2. B. 514 kHz
  3. C. 5.03 MHz
  4. D. 503 kHz
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A parallel resonant band-pass filter consists of a 90 Ω resistor in series with a parallel network made up of a 60 mH coil and a 0.02 µF capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance of 20 Ω. What is the center frequency of the filter?

  1. A. 459 Hz
  2. B. 4,591 Hz
  3. C. 999 Hz
  4. D. 2,176 Hz
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In an RL low-pass filter, the output voltage is taken across the inductor and the output lags the input.

  1. A. True
  2. B. False
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In a certain low-pass filter, fc = 3.5 kHz. If the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

  1. A. 0 V
  2. B. 5.97 V
  3. C. 6 V
  4. D. 597 mV
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In an RC low-pass filter, the output voltage is taken across the resistor and the output lags the input voltage.

  1. A. True
  2. B. False
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An RL high-pass filter consists of a 470 Ω resistor and a 600 mH coil. The output is taken across the coil. The circuit's critical frequency is

  1. A. 125 Hz
  2. B. 1,250 Hz
  3. C. 564 Hz
  4. D. 5,644 Hz
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An RL low-pass filter consists of a 5.6 mH coil and a 3.3 kΩ resistor. The output voltage is taken across the resistor. The circuit's critical frequency is

  1. A. 93.8 kHz
  2. B. 93.8 Hz
  3. C. 861 Hz
  4. D. 86.12 kHz
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An RC high-pass filter consists of a 0.2 µF capacitor and a 220 Ω resistor. The output is taken across the resistor. The circuit's critical frequency is

  1. A. 723 Hz
  2. B. 7,234 Hz
  3. C. 362 Hz
  4. D. 3,617 Hz
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The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is

  1. A. 0 V
  2. B. 15 V
  3. C. 10.60 V
  4. D. 21.21 V
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An RC low-pass filter consists of a 120 Ω resistor and a 0.002 µF capacitor. The output is taken across the capacitor. The circuit's critical frequency is

  1. A. 333 kHz
  2. B. 633 kHz
  3. C. 331 kHz
  4. D. 60 kHz
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The output voltage is 63.3% of its maximum at the critical frequencies.

  1. A. True
  2. B. False
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At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is

  1. A. 6.02 dB
  2. B. -6.02 dB
  3. C. 12.04 dB
  4. D. -12.04 dB
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