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GATE ECE 1998 | Question 1.21

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In the Bode-plot of a unity feedback control system, the value of phase of $G(j \omega)$ at the gain cross over frequency is $-125^{\circ}$. The phase margin of the system is

  1. $-125^{\circ}$
  2. $-55^{\circ}$
  3. $55^{\circ}$
  4. $125^{\circ}$

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