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Control Systems

Control Systems
The characteristic equation has the following roots for over damped stable system?

 -2±j4
 -2,-2
 -2,2
 -2,-4

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

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

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Control Systems
Electrical analogous quantity for dash-pot in force-current analogy is

 inductance.
 capacitance.
 resistance.
 conductance.

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Control Systems
Which of the following controller has sluggish response?

 derivative controller
 integral controller
 both 2 and 3
 proportional controller

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Control Systems
A transfer function has its zero in the right half of the s-plane. The function

 is positive real
 is minimum phase
 will give stable impulse response
 is non-minimum phase

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Control Systems
A open loop transfer function is given as G(s) = (s+2)/(s+1)(s-1). Find the number of encirclements about '-1+j0'?

 3
 2
 0
 1

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