The root loci of three processes are shown below:

Which of the following statements is true when these processes are connected in negative feedback with a proportional gain controller?

Question

The root loci of three processes are shown below: 
  
 Which of the following statements is true when these processes are connected in negative feedback with a proportional gain controller?

Answer

None of the processes can be stabilised by any choice of proportional gain.

Answer

The process on the right becomes unstable for a sufficiently large proportional gain.

Answer

The process with root locus in the middle can be stabilised for all positive proportional gains.

Answer

All three processes can be stabilised by a some choice of proportional gain.

Crowdly

The root loci of three processes are shown below: Which of the following st...

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