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Control Systems

Control Systems
For the polynomial , number of roots which lie in the right half of s-plane is

 1
 3
 4
 2

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Control Systems
Which of the following is/are the disadvantages of an open loop control system?

 Unreliable.
None of these
 Inaccurate.
 both 1 and 2.

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Control Systems
Find the stability for the following transfer function G(s) = 50/s(s+5) ?

 Marginally stable
 Stable
 Unstable
 Critically stable

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Control Systems
A negative feedback closed loop control system is supplied to an input of 5 volt. The system has a forward gain of 1 and a feedback gain of 1. What is the output voltage?

  2.5 Volt.
 2.0 Volt.
  1.0 Volt.
 1.5 Volt.

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Control Systems
Which of the following controller has sluggish response?

 proportional controller
 both 2 and 3
 derivative controller
 integral controller

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Control Systems
Find the angles of asymptotes of the open loop transfer function G(s) = k(s + 1)/((s(s+2)(s+4)?

 0°, 180°
 90°,180°
 90°,270°
 60°,240°

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