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Control Systems

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

 1.
 0.
 3.
 2.

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Control Systems
Find the order of a system given by

 5.
 2.
 3.
 4.

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Control Systems
Electrical analogous quantity for spring element (K) in force-voltage analogy is

 C
 1/C
 L
 R

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Control Systems
The phase of lead compensator of the system G ( s ) = ( s + a ) / ( s + b ) is at its maximum at:

 √( a / b).
  a / b.
  ab.
  √( ab ).

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Control Systems
If the bandwidth of the system is very large, the system response is

None of these
 independent of bandwidth
 slower
 faster

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Control Systems
A proportional plus derivative controller

 improves the steady state accuracy
 increases the stability of the system
 both 1 and 2
 has high sensitivity

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