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Q#1
Stability
GATE EC 1997
MSQ
+2 marks
-0 marks
The figure shows the block diagram representation of control system. The system in block A has an impulse response
. The system in block B has an impulse response
. The block ‘K’ amplifies its inputs by a factor k. For the overall system with input 
and output 
Transfer function, When k=1
Impulse response when K=0
values of k for which the system becomes unstable
k<-2
values of k for which the system becomes unstable
k>-2
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