1
GATE EE 2006
MCQ (Single Correct Answer)
+2
-0.6
Consider the following Nyquist plots of loop transfer functions over $$\omega = 0$$ to $$\omega = \infty .$$ Which of these plots represents a stable closed loop system? GATE EE 2006 Control Systems - Polar Nyquist and Bode Plot Question 6 English 1 GATE EE 2006 Control Systems - Polar Nyquist and Bode Plot Question 6 English 2 GATE EE 2006 Control Systems - Polar Nyquist and Bode Plot Question 6 English 3 GATE EE 2006 Control Systems - Polar Nyquist and Bode Plot Question 6 English 4
A
$$(1)$$ only
B
all, except $$(1)$$
C
all, except $$(3)$$
D
$$(1)$$ and $$(2)$$ only
2
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
In the $$GH(s)$$ plane, the Nyquist plot of the loop transfer function $$G\left( s \right)\,H\left( s \right) = {{\pi {e^{ - 0.25s}}} \over s}$$ passes through the negative real axis at the point
A
$$\left( { - 0.25,j0} \right)$$
B
$$\left( { - 0.5,j0} \right)$$
C
$$\left( { - 1,j0} \right)$$
D
$$\left( { - 2,j0} \right)$$
3
GATE EE 2005
MCQ (Single Correct Answer)
+2
-0.6
If the compensated system shown in the figure has a phase margin of $${60^ \circ }$$ at the crossover frequency of $$1 rad/sec,$$ the value of the gain $$K$$ is GATE EE 2005 Control Systems - Polar Nyquist and Bode Plot Question 23 English
A
$$0.366$$
B
$$0.732$$
C
$$1.366$$
D
$$2.738$$
4
GATE EE 2004
MCQ (Single Correct Answer)
+2
-0.6
The open loop transfer function of a unity feedback control system is given as $$G\left( s \right) = {{as + 1} \over {{s^2}}}.$$. The value of $$‘a’$$ to give a phase margin of $${45^0}$$ is equal to
A
$$0.141$$
B
$$0.441$$
C
$$0.841$$
D
$$1.141$$
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CBSE
Class 12