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Control Systems

Control Systems
If a body has identical properties all over, it is known as

 elastic.
 none of them.
 isotropic.
 homogeneous.

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Control Systems
In polar plots if the critical point '-1+j0' is enclosed then the system is --------

 marginally stable
 critical stable
 stable
 unstable

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

 40.
 infinity.
 0.
 20.

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Control Systems
A transfer function has a zero at s = -1 and poles at s = -1 ± j1. The multiplier being unity, if the input is step function, the steady state response is given by

 2∠90°
 0.5∠0°
 1∠0°
 0.5∠10°

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Control Systems
For the polynomial , number of roots which lie in the right half of s-plane is

 4
 3
 1
 2

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Control Systems
A second order control system has a transfer function 16/(s² + 4s + 16). Find the settling time for 2% tolerance?

 2 sec
 5 sec
 4 sec
 10 sec

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