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Control Systems

Control Systems
Find the Laplace transform for sinωt?

 ω/(s²+ω²)
 1/s
 s/(s²+ω²)
 1/s²

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Control Systems
A linear time invariant system has an impulse response e2t for t > 0 . If initial condition are 0 and input is e3t, the output for t > 0 is

  e2t + e3t.
  e3t - e2t.
  e2t - e3t.
  e5t.

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Control Systems
The compensator would provide a maximum phase shift of

 45o.
 20o.
 30o.
 60o.

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Control Systems
Number of sign changes in the entries in 1st column of Routh array denotes the no. of

 open loop poles in RHP.
 open loop zeroes in RHP.
 roots of characteristic polynomial in RHP.
 zeroes of system in RHP.

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Control Systems
Advantages of open loop control system is/are

 accurate.
All of these
 simple and economical.
 reliable.

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Control Systems
In which of the following controller band width is increased?

 proportional plus derivative controller
 both 1 and 2
 nether 1 nor 2
 proportional plus integral controller

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