Stability Theory – Exercise – 1

1. The loop transfer function of a feedback control system is given by

Mcq series

Number of asymptotes of its root loci is :

(a) 1
(b) 2
(c) 3
(d) 4

Answer
Answer : (d)
Explanation
No answer description available for this question. Let us discuss.

2. A unity feedback system has

Mcq series

In the root-locus, the break-away point occurs between :

(a) s = 0 and -1
(b) s = -1 and -∞
(c) s = -1 and -2
(d) s = -2 and -∞

Answer
Answer : (a)
Explanation
No answer description available for this question. Let us discuss.

3. If the characteristic equation of a closed-loop system is

Mcq series

the centroid of the asymptotes in root-locus will be :

(a) zero
(b) 2
(c) – 1
(d) – 2

Answer
Answer : (c)
Explanation
No answer description available for this question. Let us discuss.

4. The intersection of root locus branches with the imaginary axis can be determined by the use of :

(a) nyquist criterion
(b) polar plot
(c) routh’s criterion
(d) none of the above

Answer
Answer : (b)
Explanation
No answer description available for this question. Let us discuss.

5. The characteristic equation of a feedback control system is

Mcq series

The number of roots in the right half of s-plane are :

(a) zero
(b) 1
(c) 2
(d) 3

Answer
Answer : (c)
Explanation
No answer description available for this question. Let us discuss.
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