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A Low-pass filter circuit has a cut-off frequency of 50 kHz. The bandwidth of the filter is ______________(a) 24.6 kHz(b) 50 kHz(c) 61.5 kHz(d) 36.9 kHzI got this question by my college professor while I was bunking the class.This interesting question is from Advanced Problems on Filters topic in section Filters and Attenuators of Network Theory

Answer»

Right answer is (b) 50 KHZ

For EXPLANATION I WOULD say: 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 = 50 kHz.



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