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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 kHzI 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»

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.



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