Gate EE-2015-1 Question Paper With Solutions
Q.53.The open loop poles of a third order unity feedback system are at 0,-1,-2
Let the frequency corresponding to the point where the root locus of the system
transits to unstable region beK. Now suppose we introduce a zero in the open
loop transfer function at -3, while keeping all the earlier open loop poles intact.
Which one of the following is TRUE about the point where the root locus of the
modified system transits to unstable region?
(A) It corresponds to a frequency greater than K
(B) It corresponds to a frequency less thanK
(C) It corresponds to a frequencyK
(D) Root locus of modified system never transits to unstable
Answer:(D)
Explanation:
