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ESE 2021 Technical Quiz || Nyquist Stability Criteria
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Question 1
For the transfer function G(ω) = 5 + j ω, the corresponding Nyquist plot for positive frequency has the form.
Question 2
What will be the Gain Margin of the system 𝐺(𝑗𝜔)𝐻(𝑗𝜔) if the Nyquist Plot of the system encloses the critical point (-1+j0) in anticlockwise direction once and number of poles on RHS of s plane is 2?
Question 3
The Nyquist plot (for possible frequency) of an OLTF of a unity feedback system is given in the figure below. The PM & GM are respectively.
Question 4
The Nquist plot of a system passes through (-1,0) point in the GH plane. The phase margin of the system is
Question 5
The loop transfer function of the unity feedback system is , then the gain margin of the system is
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