1
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
The gain margin and the phase margin of a feedback system with G(s)H(s)=$${s \over {{{\left( {s + 100} \right)}^3}}}$$ are
A
0 dB, $${0^0}$$
B
$$\infty ,\infty $$
C
$$\infty ,{0^0}$$
D
88.5 dB, $$\infty $$
2
GATE ECE 2002
MCQ (Single Correct Answer)
+2
-0.6
The system with the open loop transfer function G(s)H(s)=$${1 \over {s\left( {{s^2} + s + 1} \right)}},$$ has a gain margin of
A
-6 dB
B
0 dB
C
3.5 dB
D
6 dB
3
GATE ECE 2001
MCQ (Single Correct Answer)
+2
-0.6
The open-loop DC gain of a unity negative feedback system with closed-loop transfer function $${{s + 4} \over {{s^2} + 7s + 13}}$$ is
A
$${4 \over {13}}$$
B
$${4 \over 9}$$
C
$$4$$
D
$$13$$
4
GATE ECE 1992
Subjective
+2
-0
Bode plot of a stable system is shown in fig. The transfer function of the system is GATE ECE 1992 Control Systems - Frequency Response Analysis Question 39 English
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