Practice Test: Question Set - 02
1. 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
2. . In an RL high-pass filter, the output is taken across the inductor and the output leads the input.
- (A) True
- (B) False
3. 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
4. In a certain low-pass filter, fc = 3.5 kHz. Its pass-band is
- (A) 0
Hz to 3.5 kHz
- (B) 0 Hz
- (C) 3.5 kHz
- (D) 7 kHz
5. The output voltage is 63.3% of its maximum at the critical frequencies.
- (A) True
- (B) False
6. . In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency
- (A) Is
7 kHz
- (B) Is 10 kHz
- (C) Is 12 kHz
- (D) Cannot
be determined
7. 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
8. Critical frequencies are also called -3 dB frequencies.
- (A) True
- (B) False
9. In an RC low-pass filter, the output voltage is taken across the resistor and the output lags the input voltage.
- (A) True
- (B) False
10. In a series resonant band-pass filter, a lower value of Q results in
- (A) A
higher impedance
- (B) A
smaller bandwidth
- (C) A
higher resonant frequency
- (D) A
larger bandwidth