1
GATE EE 2014 Set 3
+2
-0.6
The magnitude Bode plot of a network is shown in the figure

The maximum phase angle $${\phi _m}$$ and the corresponding gain $${G_m}$$ respectively are

A
$$- {30^ \circ }\,$$ and $$1.73dB$$
B
$$- {30^ \circ }\,$$ and $$4.77dB$$
C
$$+ {30^ \circ }\,$$ and $$4.77dB$$
D
$$+ {30^ \circ }\,$$ and $$1.73dB$$
2
GATE EE 2014 Set 2
+2
-0.6
For the transfer function $$G\left( s \right) = {{5\left( {s + 4} \right)} \over {s\left( {s + 0.25} \right)\left( {{s^2} + 4s + 25} \right)}}.$$ The values of the constant gain term and the highest corner frequency of the Bode plot respectively are
A
$$3.2, 5.0$$
B
$$16.0, 4.0$$
C
$$3.2, 4.0$$
D
$$16.0, 5.0$$
3
GATE EE 2010
+2
-0.6
The frequency response of $$G\left( s \right) = 1/\left[ {s\left( {s + 1} \right)\left( {s + 2} \right)} \right]$$ plotted in the complex $$\,G\left( {j\omega } \right)$$ plane $$\left( {for\,\,0 < \omega < \infty } \right)$$ is
A
B
C
D
4
GATE EE 2009
+2
-0.6
The open loop transfer function of a unity feedback system is given by $$G\left( s \right) = \left( {{e^{ - 0.1s}}} \right)/s.$$
The gain margin of this system is
A
$$11.95$$ $$dB$$
B
$$17.67$$ $$dB$$
C
$$21.33$$ $$dB$$
D
$$23.9$$ $$dB$$
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