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Control Systems

Control Systems
The closed loop transfer function of a system is 25/(s² + 25). The settling time of the system is

 1 sec
 25 sec
 5 sec
 ∞ sec

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Control Systems
Sparking between the contacts can be reduced by inserting

 a reactor in the line.
  a capacitor in parallel with the contacts.
 a capacitor in series with the contacts.
 a resistor in the line.

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

 signal.
 noise.
 interference.
 system.

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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.
  1.0 Volt.
 1.5 Volt.
 2.0 Volt.

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Control Systems
For a lead compensator, the poles lie:

  on origin.
  on LHS.
  on LHS before zero.
  on RHS.

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Control Systems
The impulse response of a system is c(t) = -te-t + 2 e-t (t>0). Its closed loop transfer function is

 (2s+1)/s²
 (2s+2)/s²
 (2s+2)/(s+1)²
 (2s+1)/(s+1)²

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