Question

A Low-pass filter circuit has a cut-off frequency of 1.23 kHz. The bandwidth of the filter is ______________

(a) 2.46 kHz

(b) 1.23 kHz

(c) 0.615 kHz

(d) 3.69 kHz

I have been asked this question in an interview for internship.

I need to ask this question from Advanced Problems on Filters topic in chapter Filters and Attenuators of Network Theory

Answer 1

The correct option is (b) 1.23 kHz

For explanation: The bandwidth is defined as the highest cut-off frequency to the lowest cut-off frequency. Here the lowest cut-off frequency is Zero.

For a Low-pass filter therefore, Cut-off Frequency = Bandwidth of the filter

∴ Bandwidth = 1.23 kHz.