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Control Systems

Control Systems
Error at corner frequency ωcf of first order control system is -------

 ±2 db
 ±3 db
 ±1 db
 ±4 db

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Control Systems
Given the Laplace transform of f(t) = F(s), the Laplace transform of (f(t)e-at) is equal to

 F(s)/(s+a)
 F(s+a)
 e-as*F(s)
 eas*F(s)

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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

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

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Control Systems
Lowest critical frequency is due to zero and it may be present at the origin or nearer to the origin, then the type of network is

 RL Circuit.
 LC circuit.
 RC circuit.
 RLC circuit.

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

 infinity.
 20.
 40.
 0.

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Control Systems
A transfer function is given as The steady state sinusoidal response will become zero at a frequency response of

 9 rad/s
 4 rad/s
 2 rad/s
 3 rad/s

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