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GATE Electrical 2016 Set 1 | Question: 32

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Loop transfer function of a feedback system is $G(s)H(s)=\dfrac{s+3}{s^{2}(s-3)}$. Take the Nyquist contour in the clockwise direction. Then, the Nyquist plot of $G(s) H (s)$ encircles $-1 + j0$ 

  1. Once in clockwise direction
  2. Twice in clockwise direction
  3. Once in anticlockwise direction
  4. Twice in anticlockwise direction

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