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The frequency at which the Nyquist diagram cuts the unit circle is known as:

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The frequency at which the Nyquist diagram cuts the unit circle is known as:

(a) Gain crossover frequency

(b) Phase crossover frequency

(c) Damping frequency

(d) Corner frequency

This question was addressed to me in semester exam.

Origin of the question is All-pass and Minimum-phase Systems in chapter Frequency Response Analysis of Control Systems

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Right answer is (a) Gain crossover frequency

Best explanation: The frequency at which the Nyquist diagram cuts the unit circle is known as gain cross over frequency.

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