[Solved] Which one of the following is not the property of root loci?

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Q.	Which one of the following is not the property of root loci?
A.	the root locus is symmetrical about imaginary axis
B.	they start from the open loop poles and terminate at the open loop zeroes
C.	the breakaway points are determined from dk/ds = 0
D.	segments of the real axis are the part of the root locus if and only is the total number of real poles and zeroes to their right is odd.
Answer» A. the root locus is symmetrical about imaginary axis
Explanation: the root locus is the locus traced due to the gain of the system with changing frequency and need not be symmetrical about origin.

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