1
GATE ECE 2016 Set 3
MCQ (Single Correct Answer)
+1
-0.3
The block diagram of a feedback control system is shown in the figure. The overall closed-loop gain G of the system is GATE ECE 2016 Set 3 Control Systems - Signal Flow Graph and Block Diagram Question 8 English
A
$$G=\frac{G_1G_2}{1 + G_1H_1}$$
B
$$G=\frac{G_1G_2}{1\;+\;G_1G_2+\;G_1H_1}$$
C
$$G=\frac{G_1G_2}{1\;+\;G_1G_2H_1}$$
D
$$G=\frac{G_1G_2}{1\;+\;G_1G_2\;+\;G_1G_2H_1}$$
2
GATE ECE 2016 Set 3
MCQ (Single Correct Answer)
+2
-0.6
The first two rows in the Routh table for the characteristic equation of a certain closed-loop control system are given as GATE ECE 2016 Set 3 Control Systems - Stability Question 8 English The range of K for which the system is stable is
A
-2.0 < K < 0.5
B
0 < K < 0.5
C
0 < K < $$\infty$$
D
0.5 < K < $$\infty$$
3
GATE ECE 2016 Set 3
MCQ (Single Correct Answer)
+2
-0.6
A second-order linear time-invariant system is described by the following state equations $$$\eqalign{& {d \over {dt}}{x_1}\left( t \right) + 2{x_1}\left( t \right) = 3u\left( t \right) \cr & {d \over {dt}}{x_2}\left( t \right) + {x_2}\left( t \right) = u\left( t \right) \cr} $$$

Where x1(t), then the system is

A
controllable but not observable
B
observable but not controllable
C
both controllable and observable
D
neither controllable nor observable
4
GATE ECE 2016 Set 3
MCQ (Single Correct Answer)
+2
-0.6
Following is the k-map of a Boolean function of five variable P, Q, R, S and X. The minimum for the function is GATE ECE 2016 Set 3 Digital Circuits - Boolean Algebra Question 9 English
A
$$\overline P \,\overline {Q\,} \,S\overline X + P\overline Q \,S\overline X + Q\,\overline R \,\,\overline S X + QR\overline {S\,} X$$
B
$$\overline {Q\,} \,S\,\overline X \, + Q\,\overline S \,X$$
C
$$\overline {Q\,} S\,X + Q\,\overline S \,\overline X $$
D
$$\overline {Q\,} S\, + Q\,\overline S \,$$
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