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Q#1
Stability
GATE EC 1998
MSQ
+2 marks
-0 marks
The characteristic equation of a feedback control system is 
(i) Determine the range of K for the system to be stable.
(ii) Can the system be marginally stable? If so, find the required value of K and the frequency of sustained oscillation.
(i) 
(ii) 
& 
(i) K<1.49
(ii) K=-1.49 &
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