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GATE 2023 Control system Quiz 64

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Question 1

The open loop of a unity feedback control system G(s) is unstable and has three poles on the right-hand side of the s-plane. However, the close loop system is stable. The number of encirclements mode by Nyquist plot of the (– 1, 0) point in the G(s) plane is

Question 2

Consider a negative unity feedback system has OLTF Nyquist plot for positive frequency of the given system will be

Question 3

The open-loop transfer function of a system has two poles on the imaginary axis, one in the left-half and the other in the right-half, together with a zero at the origin of coordinates and also two zeros in the left-half of the s-plane. The closed-loop response for unity feedback will be stable if the encirclement of the critical point (–1, j0) is

Question 4

The complete Nyquist plot of the open-loop transfer function G(s) H(s) of a feedback control system is shown in the figure.

If G(s) H(s) has one zero in the right-half of the s-plane, the number of poles that the closed-loop system will have in the right-half of the s-plane is

Question 5

A unity feedback system has the open loop transfer function

The Nyquist plot of a encircle the origin

Question 6

The frequency response of G(s) = plotted in the complete G(jω) plane for (0 < ω < ∞) is
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Jan 9ESE & GATE EC