If a low-pass RL filterʹs cutoff frequency is 20 kHz, its bandwidth is ________.
A)40 kHz
B)20 kHz
C)0 Hz
D)unknown

Question

Quizplus · Accepted Answer

The bandwidth of a low-pass filter is the range of frequencies that can pass through the filter with minimal attenuation. In a low-pass RL filter, frequencies below the cut-off frequency (which is 20 kHz in this case) are allowed to pass through, while frequencies above the cut-off are attenuated. Therefore, the bandwidth of the filter is equal to the cut-off frequency, which is 20 kHz. Thus, the correct answer is B) 20 kHz.

If a Low-Pass RL Filterʹs Cutoff Frequency Is 20 KHz