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Control Systems
Block Diagram and Signal Flow Graph
Marks 1Marks 2
Polar Nyquist and Bode Plot
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State Variable Analysis
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Basics of Control System
Marks 1Marks 2
Routh Hurwitz Stability
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Time Response Analysis
Marks 1Marks 2
Root Locus Techniques
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Controller and Compensator
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1
GATE EE 2025
MCQ (More than One Correct Answer)
+1
-0

The open-loop transfer function of the system shown in the figure, is

$$ G(s)=\frac{K s(s+2)}{(s+5)(s+7)} $$

For $K \geq 0$, which of the following real axis point(s) is/are on the rool locus?

GATE EE 2025 Control Systems - Root Locus Techniques Question 1 English
A
-1
B
-4
C
-6
D
-10
2
GATE EE 2014 Set 1
MCQ (Single Correct Answer)
+1
-0.3
The root locus of unity feedback system is shown in figure GATE EE 2014 Set 1 Control Systems - Root Locus Techniques Question 15 English

The closed loop transfer function of the system is

A
$${{C\left( s \right)} \over {R\left( s \right)}} = {K \over {\left( {s + 1} \right)\left( {s + 2} \right)}}$$
B
$${{C\left( s \right)} \over {R\left( s \right)}} = {{ - K} \over {\left( {s + 1} \right)\left( {s + 2} \right) + K}}$$
C
$${{C\left( s \right)} \over {R\left( s \right)}} = {K \over {\left( {s + 1} \right)\left( {s + 2} \right) - K}}$$
D
$${{C\left( s \right)} \over {R\left( s \right)}} = {K \over {\left( {s + 1} \right)\left( {s + 2} \right) + K}}$$
3
GATE EE 2005
MCQ (Single Correct Answer)
+1
-0.3
Figure shows the root locus plot (location of poles not given) of a third order system whose open loop transfer function is GATE EE 2005 Control Systems - Root Locus Techniques Question 16 English
A
$${K \over {{s^3}}}$$
B
$${K \over {{s^2}\left( {s + 1} \right)}}$$
C
$${K \over {s\left( {{s^2} + 1} \right)}}$$
D
$${K \over {s\left( {{s^2} - 1} \right)}}$$
4
GATE EE 1992
MCQ (Single Correct Answer)
+1
-0.3
Which of the following figure(s) represent valid root loci in the $$s$$ - plane for positive $$K?$$ Assume that the system has transfer function with real coefficient.
A
GATE EE 1992 Control Systems - Root Locus Techniques Question 13 English Option 1
B
GATE EE 1992 Control Systems - Root Locus Techniques Question 13 English Option 2
C
GATE EE 1992 Control Systems - Root Locus Techniques Question 13 English Option 3
D
GATE EE 1992 Control Systems - Root Locus Techniques Question 13 English Option 4
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Questions Asked from Marks 1
GATE EE 2025 (1) GATE EE 2014 Set 1 (1) GATE EE 2005 (1) GATE EE 1992 (1) GATE EE 1991 (1)
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement