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Control Systems

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

 e-2s
 2s
 0
 2

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Control Systems
Number of roots in left hand half of s plane if characteristic equation is s3 - 4s2 + s + 6 = 0 ?

 3.
 0.
 1.
 2.

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Control Systems
Sparking between the contacts can be reduced by inserting

 a resistor in the line.
 a reactor in the line.
 a capacitor in series with the contacts.
  a capacitor in parallel with the contacts.

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Control Systems
Electrical analogous element for damper element (force-voltage analogy) in mechanical translation system is

 any of the above
 inductor
 capacitor
 resistor

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Control Systems
The step response of the system described by the differential equation will be

 e6t.
 non of above.
 (1/6)*(1-e-6t).
 e-3t u(t).

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

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

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