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Q#1 Root Locus Technique GATE EE 2011 MCQ +2 marks -0.66 marks

The open loop transfer function G(s) of a unity feedback control system is given as,1

From the root locus, it can be inferred that when k tends to positive infinity,         

three roots with nearly equal real parts exist on the left half of the s-plane

one real root is found on the right half of the s-plane

the root loci cross the  axis for a finite value of k;

three real roots are found on the right half of the s-plane

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