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Control Systems

Control Systems
The unit step error coefficient of a system with unity feedback is

 0.
 infinity.
 1.
 1/6.

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Control Systems
The transfer function of a system is G(s) = 100/((s+1)(s+100)). For unit step input to the system the approximate settling time for 2% criterion is

 400 sec
 100 sec
 10 sec
 4 sec

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Control Systems
If the magnitude of G(jω)H(jω) at phase crossover frequency is 0.5. Find the gain margin of the given system?

 4
 0.5
 2
 1

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Control Systems
Consider a network function H(s) = 2(s+3)/{(s+2)(s+4)}. What is the steady state response due to step input?

 4/3
 1
 3/4
 1/2

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Control Systems
Consider a point S = -3 + j4 in the s-plane. Then for a system with the open loop transfer function ?

 S is not on root locus
None of these
 either 1 or 2
 S is on root locus

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Control Systems
Error at corner frequency ωcf of first order control system is -------

 ±4 db
 ±1 db
 ±3 db
 ±2 db

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