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Control Systems

Control Systems
The Laplace transformation of f(t) is F(S) given the final value of f(t) is

 None of them.
 Infinite.
 Zero.
 One.

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Control Systems
Slope of asymptote in Bode plot of 2nd order system is _____________________ per octave.

 3 dB
 6 dB
 12 dB
 18 dB

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Control Systems
Which of the following is/are the advantages of a closed loop control system?

 The closed loop systems are accurate.
 both 1 and 2.
 nether 1 nor 2.
 The closed loop systems are less affected by noise.

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Control Systems
A box which tells the effect of inputs on control sub system is known as

 Decision box.
 Data Box.
 Logical box.
 State box.

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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 final value?

 1/4
 3/5
 0
 1

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Control Systems
The maximum phase lag occurs at the ------------------- of the two corner frequencies?

 geometric mean
None of these
 either 1 or 2
 arithmetic mean

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