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GATE 2022 : Control System Quiz 7

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Question 1

The Nyquist plot of e-4s is a circle of radius ?

Question 2

Which one of the following statements is true about the Nyquist plot of the factor (Ts + 1), as the frequency is varied to 0 to ∞?

Question 3

The open loop transfer functions of a unity feedback system is , the maximum value of ‘k’ for the stability of a system is _______ (Rounded up to two decimal value)

Question 4

For the certain unity feedback system

The Nyquist plot is

Question 5

The polar plot for a transfer function is shown below:

An addition of zero except origin will change the plot as?

Question 6

Which of the following statements about Nyquist plot is /are correct?

1. Nyquist plot analysis is suitable for minimum & non-minimum phase systems.

2. The frequency at which open loop transfer function of a system gives |G(jω) H(jω)| = 1 is called phase crossover frequency.

3. Design of controller is possible by referring to Nyquist plot analysis.

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Aug 30ESE & GATE EE