Multiple choice

Direction: The Nyquist plot of a stable transfer function G (s) and its closed loop system in the feedback configuration are shown below.

Which of the following statements is true?

  1. G (s) is an all-pass filter.

  2. G (s) has a zero in the right half plane.

  3. G (s) is the impedance of a passive network.

  4. G (s) is marginally stable.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The plot has one encirclement of origin in clockwise direction. Thus G(s) has a zero is in RHP.

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