56. In a certain low-pass filter, fc = 3.5 kHz. Its passband is ________.
(a) 0 Hz to 3.5 kHz
(b) 0 Hz
(c) 3.5 kHz
(d) 7 kHz
57. 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 ________.
(a) 125 Hz
(b) 1,250 Hz
(c) 564 Hz
(d) 5,644 Hz
58. 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 ________.
(a) 723 Hz
(b) 7,234 Hz
(c) 362 Hz
(d) 3,617 Hz
59. 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 ________.
(a) 6.02 dB
(b) –6.02 dB
(c) 12.04 dB
(d) –12.04 dB
60. A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 μF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?
(a) 1.1 mV
(b) 11.1 mV
(c) 111 mV
(d) 200 mV
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5555555555 60. A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 μF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0? (a) 1.1 mV (b) 11.1 mV (c) 111 mV (d) 200 mV- 5555555555 53. A series resonant band-pass filter consists of a 2 mH coil, a 0.005 μF capacitor, and a 120 Ω resistor. The winding resistance of the coil is 12 Ω. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)? (a) 10.9 V (b) 1.09 V (c) 1.1 V (d) 12 V
- 5555555555 63. A series resonant band-pass filter consists of a 2 mH coil, a 0.005 μF capacitor, and a 120 Ω resistor. The winding resistance of the coil is 12 Ω. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)? (a) 10.9 V (b) 1.09 V (c) 1.1 V (d) 12 V
- 5555555555 49. 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? (a) 459 Hz (b) 4,591 Hz (c) 999 Hz (d) 2,176 Hz
- 5555555555 58. 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 ________. (a) 723 Hz (b) 7,234 Hz (c) 362 Hz (d) 3,617 Hz