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Control Systems

Control Systems
The following transfer function represents a phase-lead compensator?

 (4s+2)/(6s+1)
 1/s
 (s+4)/(s+6)
 (s+4)/(3s+6)

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

 A*B
 A-B
 A/B
 A+B

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Control Systems
For a second order under damped system subjected to unit step input the time response has first peak value to be 4 times the second over shoot. Determine the damping ratio ξ ?

 0.87
 0.707
 0.087
 0.07

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Control Systems
The characteristic equation of a feedback control is 2s4 + s3 + 3s2 + 5s + 10 = 0. The no of roots in the right half of the s-plane is

 2.
 3.
 0.
 4.

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Control Systems
A linear time invariant system has an impulse response e2t for t > 0 . If initial condition are 0 and input is e3t, the output for t > 0 is

  e5t.
  e2t + e3t.
  e2t - e3t.
  e3t - e2t.

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Control Systems
Time response for a second order system depends on the value of τ. If τ= 0 then the system is called as

  under damped system.
  over damped system.
  undamped system.
  critically damped system.

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