# Home / EEE / Passive Filters :: General Questions

### EEE :: Passive Filters

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   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   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   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   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   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   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   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   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   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   