- A. 18 V peak-to-peak
- B. Zero
- C. 9 V peak-to-peak
- D. 12.73 V peak-to-peak
Passive Filters
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The same signal in Problem 2 is applied to an RC high-pass filter. If the reactance is zero at the input frequency, the output voltage is_____.
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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_____.
- A. 0 V
- B. 15 V
- C. 10.60 V
- 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_____.
- A. 333 kHz
- B. 633 kHz
- C. 331 kHz
- D. 60 kHz
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A band-stop filter passes frequencies between its lower and upper critical frequencies and rejects all others.
- A. True
- B. False
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In a series resonant band-pass filter, a lower value of Q results in_____.
- A. A higher resonant frequency
- B. A smaller bandwidth
- C. A higher impedance
- D. A larger bandwidth
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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?
- A. 0 V
- B. 5.97 V
- C. 6 V
- D. 597 mV
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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_____.
- A. 723 Hz
- B. 7,234 Hz
- C. 362 Hz
- D. 3,617 Hz
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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_____.
- A. 18 V peak-to-peak
- B. Zero
- C. 9 V peak-to-peak
- D. 12.74 V peak-to-peak
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The output voltage is 63.3% of its maximum at the critical frequencies.
- A. True
- B. False
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The bandwidth of a resonant filter is determined by the quality factor (Q) of the circuit and the resonant frequency.
- A. True
- B. False