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Control Systems

Control Systems
Force balancing equation for elastic element (K) is (where, x = displacement)

None of these
 K *x
 K d2x/dt2
 K dx/dt

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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?

 0
 3/5
 1/4
 3/9

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Control Systems
The Laplace transform of a transportation lag of 5 seconds is

 e-5s.
 e5s.
 1/(s-5).
 1/(s+5).

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Control Systems
For a unity feedback control system open loop transfer function then acceleration error constant is

 20.
 50.
 0.
 infinity.

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Control Systems
If two blocks having gains A and B respectively are in series connection, find the resultant gain using block diagram reduction technique?

 A*B
 A-B
 A/B
 A+B

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Control Systems
For a lead compensator, the poles lie:

  on LHS.
  on RHS.
  on LHS before zero.
  on origin.

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