1
GATE EE 2016 Set 1
MCQ (Single Correct Answer)
+2
-0.6
Loop transfer function of a feedback system is $$G\left( s \right)H\left( s \right) = {{s + 3} \over {{s^2}\left( {s - 3} \right)}}.$$ Take the Nyquist contour in the clockwise direction. Then, the Nyquist plot of $$G(s)$$ $$H(s)$$ encircles $$-1+j0$$
A
once in clockwise direction
B
twice in clockwise direction
C
once in anticlockwise direction
D
twice in anticlockwise direction
2
GATE EE 2014 Set 2
MCQ (Single Correct Answer)
+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 2014 Set 3
MCQ (Single Correct Answer)
+2
-0.6
The magnitude Bode plot of a network is shown in the figure GATE EE 2014 Set 3 Control Systems - Polar Nyquist and Bode Plot Question 22 English

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 $$1.73dB$$
4
GATE EE 2014 Set 1
Numerical
+2
-0
The Bode magnitude plot of the transfer function $$G\left( s \right) = {{K\left( {1 + 0.5s} \right)\left( {1 + as} \right)} \over {s\left( {1 + {s \over 8}} \right)\left( {1 + bs} \right)\left( {1 + {s \over {36}}} \right)}}$$ is shown below: Note that $$-6$$ $$dB/octave=-20$$ $$dB/decade.$$ The value of $${a \over {bK}}$$ is _______. GATE EE 2014 Set 1 Control Systems - Polar Nyquist and Bode Plot Question 24 English
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