Frequency Domain Analysis – 1 – 5

21. The frequency where M has a peak value is known as the :

(a) peak frequency
(b) resonant frequency
(c) normalised frequency
(d) none of these

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

22. At the phase crossover frequency, ω =10 rad/s,│G(j ω)H(j ω) │= -8 dB. The system is :

(a) stable
(b) unstable
(c) conditionally stable
(d) cannot be predicted

ANSWER
Answer : (a)

EXPLANATION
No answer description available for this question. Let us discuss.

23. The phase margin of a system is 0˚. It represents a :

(a) stable system
(b) unstable system
(c) conditionally stable system
(d) marginally stable system

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

24. A transfer function having a pole – zero pattern which is anti – symmetric about the imaginary axis is called :

(a) an all – pass transfer function
(b) a minimum – phase transfer function
(c) a nonminimum – phase transfer function
(d) none of these

ANSWER
Answer : (a)

EXPLANATION
No answer description available for this question. Let us discuss.

25. At the phase crossover frequency, ω =5 rad/s,│G(jω)H(j ω) │= 10 dB. The system is :

(a) stable
(b) unstable
(c) conditionally stable
(d) cannot be predicted

ANSWER
Answer : (b)

EXPLANATION
No answer description available for this question. Let us discuss.

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