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Control Systems

Control Systems
A second order under damped system has damping ratio of 0.3. Find the phase margin of the system?

 20°
 60°
 30°
 3°

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Control Systems
The system having characteristic equation is used to be an oscillator. What is the value of k?

 2
 1
 3
 4

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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
The open loop transfer function of non unity negative feedback system is , then the number of root locus branches equal to

 3.
 0.
 1.
 2.

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Control Systems
Force balancing equation for elastic element (K) is (where, x = displacement)

 K *x
 K d2x/dt2
None of these
 K dx/dt

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Control Systems
For the polynomial , find the number of roots which lie on the right half of s-plane?

 0
 4
 1
 2

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