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MCQs

Total Questions : 25 | Page 1 of 3 pages
Question 1. The bandwidth of a resonant filter is determined by the quality factor (Q) of the circuit and the resonant frequency.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 2. Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is
  1.    0 dB
  2.    8.30 dB
  3.    -8.30 dB
  4.    0.8 dB
 Discuss Question
Answer: Option C. -> -8.30 dB
Question 3. In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency
  1.    Is 7 kHz
  2.    Is 10 kHz
  3.    Is 12 kHz
  4.    Cannot be determined
 Discuss Question
Answer: Option C. -> Is 12 kHz
Question 4. 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?
  1.    1.1 mV
  2.    11.1 mV
  3.    111 mV
  4.    200 mV
 Discuss Question
Answer: Option B. -> 11.1 mV
Question 5. In a series resonant band-pass filter, a lower value of Q results in
  1.    A higher resonant frequency
  2.    A smaller bandwidth
  3.    A higher impedance
  4.    A larger bandwidth
 Discuss Question
Answer: Option D. -> A larger bandwidth
Question 6. Critical frequencies are also called -3 dB frequencies.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 7. A band-pass filter rejects all frequencies within a band between a lower and an upper critical frequency and passes all others.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 8. In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency is
  1.    7 kHz
  2.    10 kHz
  3.    12 kHz
  4.    Cannot be determined
 Discuss Question
Answer: Option C. -> 12 kHz
Question 9. An RC high-pass filter consists of an 820 Ω resistor. What is the value of C so that Xc is ten times less than Rat an input frequency of 12 kHz?
  1.    81 µF
  2.    161 µF
  3.    0.161 µF
  4.    220 µF
 Discuss Question
Answer: Option C. -> 0.161 µF
Question 10. 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
  1.    18 V peak-to-peak
  2.    Zero
  3.    9 V peak-to-peak
  4.    12.73 V peak-to-peak
 Discuss Question
Answer: Option A. -> 18 V peak-to-peak

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