Electronics and Communication Engineering - Exam Questions Papers - Discussion

7. 

The Nyquist plot of a stable, transfer function G(s) is shown in the figure. We are interested in the stability of the closed loop system in the feedback configuration shown.

Which of the following statements is true?

[A]. G(s) is an all-pass filter
[B]. G(s) has a zero in the right-half plane
[C]. G(s) is the impedance of a passive network
[D]. G(s) is marginally stable

Answer: Option C

Explanation:

No answer description available for this question.

Abir said: (Jul 22, 2016)  
The plot has one encirclement of origin in a clockwise direction. Thus G (s) has a zero in RHP.

So, the correct Answer is (B).

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