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Control Systems

Control Systems
The Laplace transform of a transportation lag of 5 seconds is

 e-5s.
 1/(s+5).
 e5s.
 1/(s-5).

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Control Systems
A transfer function has its zero in the right half of the s-plane. The function

 will give stable impulse response
 is minimum phase
 is non-minimum phase
 is positive real

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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
If the transfer function of a phase lead compensator is (s+a)/(s+b) and that of a lag compensator is (s+p)/(s+q), then which one of the following sets of conditions must be satisfied?

 a > b, p > q
 a > b, p < q
 a < b, p < q
 a < b, p >q

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Control Systems
The initial slope of Bode plot for a transfer function having no poles at the origin is

 -10dB/decade.
 -20dB/decade.
 0 dB/decade
 +10dB/decade.

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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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