1
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
The unit - impulse response of a unity - feedback control system is given by $$c\left( t \right) = - t{e^{ - t}} + 2\,\,{e^{ - t}},\,\left( {t \ge 0} \right)$$ the open loop transfer function is equal to
A
$${{s + 1} \over {{{\left( {s + 2} \right)}^2}}}$$
B
$${{2s + 1} \over {{s^2}}}$$
C
$${{s + 1} \over {{{\left( {s + 1} \right)}^2}}}$$
D
$${{s + 1} \over {{s^2}}}$$
2
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
$$0.173$$
3
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
4
GATE EE 1995
MCQ (Single Correct Answer)
+1
-0.3
The Laplace transformation of $$f(t)$$ is $$F(s).$$ Given $$F\left( s \right) = {\omega \over {{s^2} + {\omega ^2}}},$$ the final value of $$f(t)$$ is
A
infinity
B
zero
C
one
D
none of these
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