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Control Systems

Control Systems
Force balancing equation of a dash-pot element is (where, x = displacement)

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

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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
 2
 4
 8

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Control Systems
The magnitude condition for root locus is ..................

 |G(s)H(s)| = 1
 |G(s)H(s)| = 2
 |G(s)H(s)| = 0
 |G(s)H(s)| = ∞

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Control Systems
Angle condition for complimentary root locus or inverse root locus is

 ± (2q + 1) 360°
 ± (2q) 180°
 ± (2q) 360°
 ± (2q + 1) 180°

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Control Systems
The poles of the second order system are at -3 ± j4. The damping ratio of the system is

 3/4
 3/7
 3/5
 4/5

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Control Systems
Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is

 Any of the above.
 LC.
 RL.
 RC.

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