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Stability Theory – 1 – 3

11. The root locus always starts at the :

(a) open-loop poles
(b) open-loop zeros
(c) closed-loop poles
(d) closed-loop zeros

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

12. Angles of asymptotes are measured at the centroid with respect to :

(a) negative real axis
(b) positive real axis
(c) imaginary axis
(d) none of these

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

13. The angle of arrival at a real zero is always :

(a) 0°
(b) 180°
(c) either 0° or 180°
(d) to be calculated for each problem

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

14. The roots of the characteristic equation are the same as :

(a) open-loop poles
(b) open-loop zeros
(c) closed-loop poles
(d) closed-loop zeros

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

15. An open-loop transfer function has 4 poles and 1 zero. The number of branches of root locus is :

(a) 4
(b) 1
(c) 5
(d) 3

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

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