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Control Systems

Control Systems
The magnitude of a transfer function G(jω)H(jω) at gain cross over frequency is

 1
 0
 infinity
 any of the above

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

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Control Systems
The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no of roots in the right half of the s-plane is

 3.
 4.
 2.
 0.

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

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

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Control Systems
The input-output relationship of a linear time invariant continuous time system is given by r(t) = d²c(t)/dt² + 3 dc(t)/dt + 2 c(t) Where r(t) and c(t) are input and output respectively. What is the transfer function of the system equal to?

 2/(s² + 3s + 2)
 2/(s² + s + 2)
 1/(s² + 3s + 2)
 1/(s² + s + 2)

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