Process Control and Instrumentation
A stable system is the one

None of these
Which satisfies the conditions for a servo problem
Which exhibits an unbounded response to a bounded input
For which the output response is bounded for all bounded input

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Process Control and Instrumentation
The characteristic equation for the control system with a closed loop transfer function G₁/1 + G₂ is given by 1 + G₂ = 0. The characteristic equation for the control system

All of these
Is the same for set point or load changes
Depends only upon the open loop transfer function
Determines its stability

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