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Control Systems

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

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

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Control Systems
Time constant is defined as the time taken by the response of the system to reach ----------- ?

 70.7% of the final value
 100% of the final value
 50% of the final value
 63% of the final value

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Control Systems
The system is initially critical damped. If the gain of the system is doubled, then it will exhibit

 under damped characteristics.
 over damped characteristics.
 critical damped characteristics.
 undamped characteristics.

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Control Systems
With regard to filtering property, the lead compensator is

 high pass filter
 low pass filter
 bandpass filter
 band reject filter

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Control Systems
The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the initial value?

 3/5
 3/9
 1/4
 0

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Control Systems
The transfer function of a linear time invariant system is given as G(s) = 10/(s² + 10s + 10). The steady state value of the output of the system for step input applied at time instant t=2 sec will be

 undefined
 infinity
 1
 0

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