1
GATE EE 1998
MCQ (Single Correct Answer)
+1
-0.3
The output of a linear time invariant control system is $$c(t)$$ for a certain input $$r(t).$$ If $$r(t)$$ is modified by passing it through a block whose transfer function is $${e^{ - s}}$$ and then applied to the system, the modified output of the system would be
A
$${{c\left( t \right)} \over {1 + {e^t}}}$$
B
$${{c\left( t \right)} \over {1 + {e^{ - t}}}}$$
C
$$c\left( {t - 1} \right)u\left( {t - 1} \right)$$
D
$$c\left( t \right)\,\,u\left( {t - 1} \right)$$
2
GATE EE 1997
MCQ (Single Correct Answer)
+1
-0.3
Introduction of integral action in the forward path of a unity feedback system result in a
A
marginally stable system
B
system with no steady state error
C
system with increased stability margin
D
system with better speed of response
3
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
Consider the unit step response of a unity feedback control system whose open loop transfer function is $$G\left( s \right) = {1 \over {s\left( {s + 1} \right)}}.$$ The maximum overshoot is equal to
A
$$0.143$$
B
$$0.153$$
C
$$0.163$$
D
$$0.173$$
4
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
For a feedback control system of type $$2,$$ the steady state error for a ramp input is
A
infinite
B
constant
C
zero
D
indeterminate
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