Band Pass Filter MCQ’s

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This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Band Pass Filter”.

1. Narrow band-pass filters are defined as
a) Q < 10
b) Q = 10
c) Q > 10
d) None of the mentioned

2. A band-pass filter has a bandwidth of 250Hz and center frequency of 866Hz. Find the quality factor of the filter?
a) 3.46
b) 6.42
c) 4.84
d) None of the mentioned

3. Which filter attenuates any frequency outside the pass band?
a) Band-pass filter
b) Band-reject filter
c) Band-stop filter
d) All of the mentioned

4. Find the center frequency of wide band-pass filter
a) fc= √(fh ×fL)
b) fc= √(fh +fL)
c) fc= √(fh -fL)
d) fc= √(fh /fL)

5. When a second order high pass filter and second order low pass sections are cascaded, the resultant filter is a
a) ±80dB/decade band-pass filter
b) ±40dB/decade band-pass filter
c) ±20dB/ decade band-pass filter
d) None of the mentioned

6. Compute the quality factor of the wide band-pass filter with high and low cut-off frequencies equal to 950Hz and 250Hz.
a) 0.278
b) 0.348
c) 0.696
d) 0.994

7. Find out the voltage gain magnitude equation for the wide band-pass filter.
a) AFt×( f/fL)/√[(1+(f/fh)2]×[1+(f/fL)2].
b) AFt/ √{[1+(f/fh)2]×[1+(f/fL)2]}
c) AFt/ √{[1+(f/fh)2]/[1+(f/fL)2]}
d) [AFt/(f/fL)]/ √{[1+(f/fh)2]/[1+(f/fL)2]}

8. Find the voltage gain magnitude of the wide band-pass filter?
Where total pass band gain is=6, input frequency = 750Hz, Low cut-off frequency =200Hz and
high cut-off frequency=1khz.
a) 13.36 dB
b) 12.25 dB
c) 11.71 dB
d) 14.837dB

9. The details of low pass filter sections are given as fh =10kHz, AF= 2 and f=1.2kHz. Find the voltage gain magnitude of first order wide band-pass filter, if the voltage gain magnitude of high pass filter section is 8.32dB.
a) 48.13dB
b) 10.02dB
c) 14.28dB
d) 65.99dB

10. Design a narrow band-pass filter, with fc=1kHz, Q= 13 and AF=10 (Take C=0.1µF)
a)
Find the narrow band-pass filter from the given diagram
b)
Find the factor of narrow band-pass filter from the given diagram
c)
Find the advantage of narrow band-pass filter from the given diagram
d)
Find the quality factor from the given diagram

11. The advantage of narrow band-pass filter is
a) fc can be changed without changing gain
b) fc can be changed without changing bandwidth
c) fc can be changed without changing resistors
d) All of the mentioned

12. The quality factor of a wide band-pass filter can be
a) 12.6
b) 9.1
c) 14.2
d) 10.9

13. If the gain at center frequency is 10, find the quality factor of narrow band-pass filter
a) 1
b) 2
c) 3
d) None of the mentioned

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