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Control Systems

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?

 2
 4
 1
 0.5

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Control Systems
A function of one or more variables which conveys information about the nature of physical phenomenon is called

 noise.
 system.
 signal.
 interference.

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Control Systems
A second order system has peak over shoot = 50% and period of oscillations 0.2 seconds. Find the resonant frequency?

 29.74 ra/s
 31.41 rad/s
 32.16 rad/s
 30.63 rad/s

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Control Systems
What is the open loop DC gain of a unity feedback control system having closed loop transfer function as

 4/9
 9/4
 13/4
 4/13

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Control Systems
Time response for a second order system depends on the value of τ. If τ= 0 then the system is called as

  over damped system.
  undamped system.
  under damped system.
  critically damped system.

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Control Systems
Two identical first order systems have been cascaded non interactively. The unit step response of the systems will be

 critical damped
 under damped
 Over damped
 un damped

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