logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electrical Engineering ‣ Passive Filters Comments
  • Question

  • An RC high-pass filter consists of an 820 Ω resistor. What is the value of C so that Xc is ten times less than R at an input frequency of 12 kHz?


  • Options
  • A. 81 µF
  • B. 161 µF
  • C. 0.161 µF
  • D. 220 µF

  • Correct Answer
  • 0.161 µF 

    • Passive Filters problems

    Search Results

    • 1. 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

    • Options
    • A. 6.02 dB
    • B. ?6.02 dB
    • C. 12.04 dB
    • D. ?12.04 dB
      • Discuss
    • 2. Referring to Problem 8, assume the input voltage is 15 V dc. What is the output voltage?

    • Options
    • A. 0 V
    • B. 15 V
    • C. 7.07 V
    • D. 10.6 V
      • Discuss
    • 3. 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

    • Options
    • A. 125 Hz
    • B. 1,250 Hz
    • C. 564 Hz
    • D. 5,644 Hz
      • Discuss
    • 4. 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

    • Options
    • A. 93.8 kHz
    • B. 93.8 Hz
    • C. 861 Hz
    • D. 86.12 kHz
      • Discuss
    • 5. 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?

    • Options
    • A. 459 Hz
    • B. 4,591 Hz
    • C. 999 Hz
    • D. 2,176 Hz
      • Discuss
    • 6. A sinusoidal voltage with a peak-to-peak value of 18 V is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is

    • Options
    • A. 18 V peak-to-peak
    • B. zero
    • C. 9 V peak-to-peak
    • D. 12.74 V peak-to-peak
      • Discuss
    • 7. In an RC differentiator, responding to repetitive pulses, the average value of the output

    • Options
    • A. is zero
    • B. is equal to the input voltage
    • C. is 63 percent of the input voltage
    • D. cannot be determined
      • Discuss
    • 8. If a periodic pulse waveform has a pulse width and the time between pulses each equal to or greater than five time constants, the capacitor will

    • Options
    • A. partially charge and fully discharge during each period of the input waveform
    • B. fully charge and partially discharge during each period of the input waveform
    • C. fully charge and fully discharge during each period of the input waveform
    • D. partially charge and partially discharge during each period of the input waveform
      • Discuss
    • 9. What is the highest frequency contained in a pulse that has a rise and fall time equal to 10 microseconds (10 µs)?

    • Options
    • A. 35 kHz
    • B. 3.5 kHz
    • C. 10 kHz
    • D. 100 kHz
      • Discuss
    • 10. Referring to Problem 7, how much will the capacitor charge if the pulse width is increased to 12 ms?

    • Options
    • A. 2.51 V
    • B. 25.14 V
    • C. 4.86 V
    • D. 12.76 V
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright İCuriousTab. All rights reserved.