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Control Systems

Control Systems
When the system gain is doubled the gain margin becomes?

None of these
 2 times
 1/2 times
 Remains unaffected

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Control Systems
Transient state analysis depends on which of the following?

 order of system
 nether 1 nor 2
 type of system
 both 1 and 2

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Control Systems
Number of roots in left hand half of s plane if characteristic equation is s3 - 4s2 + s + 6 = 0 ?

 1.
 0.
 2.
 3.

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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

 2 sec.
 0.4 sec.
 1.2 sec.
 1.6 sec.

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Control Systems
If two blocks having gains A and B respectively are in parallel connection, find the resultant gain using block diagram reduction technique?

 2(A+B)
 A+B
 A*B
 A/B

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Control Systems
None of the poles of a linear control system lie in the right half of s plane. For a bounded input, the output of this system

  could be unbounded.
  tends to zero.
  always bounded.
  none of these.

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