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Control Systems

Control Systems
Based on relation between the arm impedances the filters can be categorized into how many types?

 Not classified at all.
 4.
  2.
 3.

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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

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

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Control Systems
Time constant is defined as the time taken by the response of the system to reach ----------- ?

 50% of the final value
 100% of the final value
 70.7% of the final value
 63% of the final value

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

 1/6.
 1.
 0.
 infinity.

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Control Systems
The second order system defined by 25/(s2 + 5s + 25) is given a step input. The time taken for the output to settle with in 2 % of input is

 1.6 sec.
 0.4 sec.
 2 sec.
 1.2 sec.

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Control Systems
Which of the following is the correct expression for the transfer function of an electrical RC phase lag compensating network?

 1/(1+RCS)
 RCS/(1+RCS)
 C/(1+RCS)
 RC/(1+RCS)

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