1.

Consider a feedback control system:The root locus of the system has which of the following characteristics?

A. Root loci exist on the negative real axis between -2 and -1 and between -3 and -∞. When K → ∞, the root loci terminate at s = -2 and s = -3
B. Root loci exist on the negative real axis between 0 and -1 and between -2 and -3. When K → ∞, two roots are going to - ∞
C. Root loci exist on the negative real axis between 0 and -1 between -2 and -3. When K → ∞, two roots are going to ∞.
D. Root loci exist on the negative real axis between 0 and -1 and between -2 and -3. When K → ∞, the root loci terminate at s = -2 and s = -3
Answer» E.


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