Replacing the inductor in a series resonant band-pass filter with one having a lower $Q$ value causes the bandwidth to_________
A) increase
B) remain the same
C) be more selective
D) decrease

Question

Replacing the inductor in a series resonant band-pass filter with one having a lower $Q$  value causes the bandwidth to_________
A) increase
B) remain the same
C) be more selective
D) decrease

Quizplus · Accepted Answer

In a series resonant band-pass filter, the bandwidth is determined by the Q factor of the inductor. The higher the Q factor, the narrower the bandwidth. If the inductor is replaced with one having a lower Q value, the bandwidth will increase since it is less selective in passing a range of frequencies.

Replacing the Inductor in a Series Resonant Band-Pass Filter with One