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Control Systems

Control Systems
If a circuit consists of two mass elements, two spring elements and four friction elements. Find the order of transfer function?

 4
 6
 12
 2

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Control Systems
A system has poles at 0.01 Hz, 1 Hz and 80 Hz; zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is

 90°
 -180°
 180°
 -90°

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Control Systems
The characteristic equation of a control system is give by s(s + 4)(s² + 2s + 1) + k(s + 1) = 0. Find the angle between the asymptotes?

 120°
 60°
 360°
 180°

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Control Systems
Poles and zeros are arranged alternatively on negative real axis, then type of network is/are

 RC network.
 RL network.
 Both 2 and 3.
 LC network.

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Control Systems
The transfer function of a system is given as below, if a = 0.1, then the steady state error to unity ramp input will be

 0.25.
 0.49.
 0.16.
 0.35.

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

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