6. The quality factor of a series RLC resonant circuit increases if (a) R decreases (b) R increases (c) B.W. increases (d) input voltage increases 7. A band-pass filter is one which (a) attenuates all frequencies below the lower cutoff frequency fer (b) attenuates all frequencies above the upper cutoff frequency fcz (c) attenuates all frequencies lying between fcaand fca (d) passes all frequencies lying between fciand fcz

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6. The quality factor of a series RLC resonant circuit increases if
(a) R decreases
(b) R increases
(c) B.W. increases
(d) input voltage increases
7. A band-pass filter is one which
(a) attenuates all frequencies below the lower cutoff frequency fer
(b) attenuates all frequencies above the upper cutoff frequency fcz
(c) attenuates all frequencies lying between feiand fez
(d) passes all frequencies lying between fer and fcz
Transcribed Image Text:6. The quality factor of a series RLC resonant circuit increases if (a) R decreases (b) R increases (c) B.W. increases (d) input voltage increases 7. A band-pass filter is one which (a) attenuates all frequencies below the lower cutoff frequency fer (b) attenuates all frequencies above the upper cutoff frequency fcz (c) attenuates all frequencies lying between feiand fez (d) passes all frequencies lying between fer and fcz
Expert Solution
Step 1

Answer 6: 

For series, RLC circuit formula for quality factor is given by 

Q=1RLCAnd Q=BWfr

Hence from the above formula, it is clear that 

Q increases,  if R decreases and BW increases.

Hence the correct option is 'a' and 'c' .

 

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