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Control Systems

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

 -2,2
 -2,-4
 -2±j4
 -2,-2

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Control Systems
The initial slope of Bode plot for a transfer function having no poles at the origin is

 0 dB/decade
 -10dB/decade.
 +10dB/decade.
 -20dB/decade.

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Control Systems
Consider the function F(s) = ω/(s²+ω²). Where F(s) = Laplace transform of f(t). The final value of f(t) is equal to

 infinite
 finite constant
 zero
 a value between -1 and +1

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Control Systems
The compensator would provide a maximum phase shift of

 45o.
 60o.
 30o.
 20o.

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Control Systems
A system has poles at 0.01 Hz, 1 Hz and 80 Hz; zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is

 -90°
 -180°
 90°
 180°

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Control Systems
Which of the following is/are the example of actuator?

 All
 Electric motor
 Hydraulic motor
 Pneumatic motor

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