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# Stability Theory – 1 – 5

21. Break points can be :

(a) only real
(b) only complex
(c) real or complex
(d) none of these

Explanation
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22. The root locus can be used to determine :

(a) the absolute stability of a system
(b) the relative stability of a system
(c) both absolute and relative stabilities of a system
(d) none of these

Explanation
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23. Asymptotes can intersect :

(a) only on the negative real axis
(b) only on the positive real axis
(c) any where on the real axis
(d) none of these

Explanation
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24. The angle of departure from a real pole is always :

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

Explanation
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25. The locus locus gives terminates on the :

(a) open-loop zeros
(b) closed-loop zeros
(c) both of the characteristic equation
(d) none of these