Passive Filters Mcqs - Set 2

1)   Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is__________?

a. 0 dB
b. 8.30 dB
c. -8.30 dB
d. 0.8 dB
Answer  Explanation 

ANSWER: -8.30 dB

Explanation:
No explanation is available for this question!

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

a. 5.14 MHz
b. 514 kHz
c. 5.03 MHz
d. 503 kHz
Answer  Explanation 

ANSWER: 5.14 MHz

Explanation:
No explanation is available for this question!

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
Answer  Explanation 

ANSWER: 5.97 V

Explanation:
No explanation is available for this question!

4)   An RL low-pass filter consists of a 5.6 mH coil and a 3.3 kΩ resistor. The output voltage is taken across the resistor. The circuit’s critical frequency is______________?

a. 93.8 kHz
b. 93.8 Hz
c. 861 Hz
d. 86.12 kHz
Answer  Explanation 

ANSWER: 93.8 kHz

Explanation:
No explanation is available for this question!

5)   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
Answer  Explanation 

ANSWER: 3,617 Hz

Explanation:
No explanation is available for this question!

6)   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
Answer  Explanation 

ANSWER: -6.02 dB

Explanation:
No explanation is available for this question!

7)   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
Answer  Explanation 

ANSWER: 10.9 V

Explanation:
No explanation is available for this question!

8)   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
Answer  Explanation 

ANSWER: 11.1 mV

Explanation:
No explanation is available for this question!

9)   In a certain low-pass filter, fc = 3.5 kHz. Its passband is____________?

a. 3.5 kHz
b. 0 Hz
c. 0 Hz to 3.5 kHz
d. 7 kHz
Answer  Explanation 

ANSWER: 0 Hz to 3.5 kHz

Explanation:
No explanation is available for this question!

10)   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
Answer  Explanation 

ANSWER: is 12 kHz

Explanation:
No explanation is available for this question!

11)   At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V.the filter’s bandwidth is____________?

a. 530 Hz
b. 106 Hz
c. 11.5 Hz
d. 53 Hz
Answer  Explanation 

ANSWER: 53 Hz

Explanation:
No explanation is available for this question!

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