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Control Systems

Control Systems
what is the Laplace transform of a function δ(t-2)?

 2
 e-2s
 0
 2s

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Control Systems
When the system gain is doubled the gain margin becomes?

None of these
 2 times
 1/2 times
 Remains unaffected

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Control Systems
The unit impulse response of second order system is 1/6 * e-0.8t sin(0.6t). THen the natural frequency is

 0.6 rad/s
 0.8 rad/s
 2 rad/s
 1 rad/s

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Control Systems
The characteristic equation of a control system is give by s(s + 4)(s² + 2s + 1) + k(s + 1) = 0. Find the angle between the asymptotes?

 120°
 180°
 360°
 60°

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Control Systems
Which of the following is/are represents the lag compensator?

 (s+2)/(s+5)
 both 1 and 2
 (s+5)/(s+6)
 (s+2)/(s+1)

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

 inductance.
 resistance.
 capacitance.
 conductance.

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