1
GATE ECE 2007
+2
-0.6
A unity feedback control system has an open-loop transfer function $$G\left(s\right)=\frac K{s\left(s^2+7s+12\right)}$$$The gain K for which s = −1 + j1 will lie on the root locus of this system is: A 4 B 5.5 C 6.5 D 10 2 GATE ECE 2005 MCQ (Single Correct Answer) +2 -0.6 A unity feedback system is given as,$$G\left(s\right)=\frac{K\left(1-s\right)}{s\left(s+3\right)}$$$ indicate the correct root locus diagram.
A B C D 3
GATE ECE 2003
+2
-0.6
The root locus of the system $$G\left(s\right)H\left(s\right)=\frac K{s\left(s+2\right)\left(s+3\right)}$$$has the break-away point located at A (-0.5,0) B (-2.548,0) C (-4,0) D (-0.784,0) 4 GATE ECE 1999 MCQ (Single Correct Answer) +2 -0.6 Consider the points s1 = −3 + j4 and s2 = −3 − j2 in the s-plane. Then, for a system with the open loop transfer function $$G\left(s\right)H\left(s\right)=\frac K{\left(s+1\right)^4}$$$
A
s1 is on the root locus, but not s2
B
s2 is on the root locus, but not s1
C
both s1 and s2 are on the root locus
D
neither s1 nor s2 is on the root locus
GATE ECE Subjects
Network Theory
Control Systems
Electronic Devices and VLSI
Analog Circuits
Digital Circuits
Microprocessors
Signals and Systems
Communications
Electromagnetics
General Aptitude
Engineering Mathematics
EXAM MAP
Joint Entrance Examination