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Control Systems

Control Systems
Which of the following is the electrical analogous element for displacement in force-voltage analogy?

 Flux.
 Charge.
 Current.
 Voltage.

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Control Systems
The open loop transfer function of a unity feedback system is given by G(s) = 1/(s+2)². The closed loop transfer function will have poles at

 -2+j,-2-j
 -2,-1
 -2,2
 -2,-2

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Control Systems
A unity feed back system has forward transfer function The range of k for the system to be stable is

None of these
 0 < k < 3900.
 0 < k < 39.
 0 < k < 390.

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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

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

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Control Systems
The characteristic equation for closed loop system is given as . The value of k for which the system becomes just stable is

 8
 4
 6
 2

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Control Systems
The unit step error coefficient of a system with unity feedback is

 1/6.
 1.
 0.
 infinity.

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