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  1. In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency

  2. A.
    is 7 kHz
    B.
    is 10 kHz
    C.
    is 12 kHz
    D.
    cannot be determined

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  3. An RL low-pass filter consists of a 5.6 mH coil and a 3.3 k resistor. The output voltage is taken across the resistor. The circuit's critical frequency is

  4. A.
    93.8 kHz
    B.
    93.8 Hz
    C.
    861 Hz
    D.
    86.12 kHz

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  5. In a series resonant band-pass filter, a lower value of Q results in

  6. A.
    a higher resonant frequency
    B.
    a smaller bandwidth
    C.
    a higher impedance
    D.
    a larger bandwidth

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  7. The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is

  8. A.
    0 V
    B.
    15 V
    C.
    10.60 V
    D.
    21.21 V

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  9. A parallel resonant band-pass filter consists of a 90 resistor in series with a parallel network made up of a 60 mH coil and a 0.02 F capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance of 20 . What is the center frequency of the filter?

  10. A.
    459 Hz
    B.
    4,591 Hz
    C.
    999 Hz
    D.
    2,176 Hz

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  11. An RL high-pass filter consists of a 470 resistor and a 600 mH coil. The output is taken across the coil. The circuit's critical frequency is

  12. A.
    125 Hz
    B.
    1,250 Hz
    C.
    564 Hz
    D.
    5,644 Hz

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

  14. A.
    5.14 MHz
    B.
    514 kHz
    C.
    5.03 MHz
    D.
    503 kHz

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  15. A series resonant band-pass filter consists of a 2 mH coil, a 0.005 F capacitor, and a 120 resistor. The winding resistance of the coil is 12 . The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)?

  16. A.
    10.9 V
    B.
    1.09 V
    C.
    1.1 V
    D.
    12 V

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  17. An RC low-pass filter consists of a 120 resistor and a 0.002 F capacitor. The output is taken across the capacitor. The circuit's critical frequency is

  18. A.
    333 kHz
    B.
    633 kHz
    C.
    331 kHz
    D.
    60 kHz

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  19. Referring to Problem 15, if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

  20. A.
    6 V
    B.
    597 mV
    C.
    5.97 V
    D.
    0 V

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