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Control Systems

Control Systems
The value of 'a' in to give phase margin = 45o will be

 1.18.
 0.707.
 1.414.
 0.9.

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Control Systems
Which of the following is/are represents the lead compensator?

 (s+2)/(s+1)
 (s+2)/(s+5)
 both 2 and 3
 (s+5)/(s+6)

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Control Systems
Transfer function of zero order hold response is

 (1 / s) × (1 - e-st).
 (1 / s) × e-st.
 (s) × (1 - est).
 (1 / s) × (1 - est).

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

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

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Control Systems
In signal flow graph input node is node having only------------

None of these
 both 1 and 2.
 outgoing branches.
 incoming branches.

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

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

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