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Control Systems

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

 infinity.
 1/6.
 0.
 1.

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Control Systems
A system of constant voltage and constant frequency is called _________________ system.

  feedback.
  infinite.
  zero.
None of these

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Control Systems
The device necessarily used for automatic temperature control in a furnace is

 Thermocouple.
 Thermostat.
 Auto-transformer.
 Any of above.

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Control Systems
Find the order of a system given by

 4.
 3.
 2.
 5.

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

 50.
 10.
 0.
 infinity.

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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

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

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