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Control Systems

Control Systems
Given the Laplace transform of f(t) = F(s), the Laplace transform of (f(t)e-at) is equal to

 eas*F(s)
 e-as*F(s)
 F(s)/(s+a)
 F(s+a)

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Control Systems
A box which tells the effect of inputs on control sub system is known as

 Data Box.
 State box.
 Logical box.
 Decision box.

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Control Systems
Which of the following controller has sluggish response?

 derivative controller
 both 2 and 3
 integral controller
 proportional controller

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Control Systems
The system having characteristic equation is used to be an oscillator. What is the value of k?

 2
 1
 3
 4

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Control Systems
The magnitude of a transfer function G(jω)H(jω) at gain cross over frequency is

 1
 infinity
 0
 any of the above

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Control Systems
The transfer function of a system is G(s) = 100/((s+1)(s+100)). For unit step input to the system the approximate settling time for 2% criterion is

 400 sec
 10 sec
 100 sec
 4 sec

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