Question

Frequency at which the magnitude is 3 db below its
zero frequency value is called
(a) Cut Off Frequency
(b) Resonant frequency
(C) Phase Crossover frequency
(d) Gain Crossover frequency

Answer 1

All low pass filters have a certain cutoff frequency, above which the output voltage drops below 70.7% of its input voltage. The frequency at which the magnitude response is 3 dB lower than the value at 0 Hz, is known as Cutoff Frequency of a low pass filter.