Multiple choice

The figure shows the Nyquist plot of the open-loop transfer function G(s)H(s) of a system. If G(s)H(s) has one right hand pole, the closed loop system is

  1. always stable

  2. unstable with one closed loop right hand pole

  3. unstable with two closed loop right hand poles

  4. unstable with three closed loop right hand poles
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A Correct answer
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