1
GATE ECE 2001
MCQ (Single Correct Answer)
+1
-0.3
If the characteristic equation of a closed-loop system is s2 + 2s + 2 =0, then the system is
A
overdamped
B
critically damped
C
underdamped
D
undamped
2
GATE ECE 1999
MCQ (Single Correct Answer)
+1
-0.3
For a second-order system with the closed-loop transfer function $$$T\left(s\right)=\frac9{s^2+4s+9}$$$ the settling time for 2% band in seconds is
A
1.5
B
2.0
C
3.0
D
4.0
3
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
Consider a unity feedback control system with open-loop transfer function $$G\left(s\right)\;=\;\frac K{s\left(s\;+\;1\right)}$$ . The steady state error of the system due to a unit step input is
A
zero
B
K
C
1/K
D
infinite
4
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
If $$F\left(s\right)\;=\;\frac\omega{s^2\;+\;\omega^2}$$, then the value of $$\underset{t\rightarrow\infty}{\lim\;}f\left(t\right),\;\left\{where\;F\left(s\right)\;is\;the\;L\left[f\left(t\right)\right]\right\}$$
A
cannot be determined
B
is zero
C
is unity
D
is infinite
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