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Control Systems

Control Systems
The amplitude spectrum of a Gaussian pulse is

 Impulse function.
 Uniform.
 A sine function.
 Gaussian.

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Control Systems
Which of the following are the disadvantages of a closed loop control system?

 Complex and costly.
All of these
 Reduces the overall gain.
 Oscillatory response.

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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

 13/4
 9/4
 4/9
 4/13

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Control Systems
The following transfer function represents a phase-lead compensator?

 (s+4)/(s+6)
 1/s
 (s+4)/(3s+6)
 (4s+2)/(6s+1)

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Control Systems
Number of roots in left hand half of s plane if characteristic equation is s3 - 4s2 + s + 6 = 0 ?

 0.
 1.
 3.
 2.

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Control Systems
A linear time invariant system, initially at rest when subjected to a unit step input gave response c(t) = te-t (t ≥ 0). The transfer function of the system is

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

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