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Control Systems

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

 2.
 3.
 0.
 1.

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Control Systems
A lead compensator used for a closed loop controller has the following transfer function For such a lead compensator

 a < b.
 a < kb.
 b < a.
 a > kb.

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Control Systems
The open loop transfer function for unity feedback system is given by 5(1+0.1s) / (s(1+5s)(1+20s)) Find the steady state error for a step input of magnitude 10 is equal to

 zero.
 2.
 infinite.
 5.

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Control Systems
The characteristic equation for closed loop system is given as . The value of k for which the system becomes just stable is

 6
 8
 2
 4

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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
Slope of asymptote in Bode plot of 2nd order system is _____________________ per octave.

 3 dB
 18 dB
 12 dB
 6 dB

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