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Control Systems

Control Systems
The phase margin of a system having the loop transfer function G(s)H(s) = 2√3/s(s+1) is

 45°
 30°
 80°
 60°

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Control Systems
Find the relation of damped natural frequency (ωd)

 (ωn) √(1-ζ²)
 (ωn) √(1-4ζ²)
 (ωn) √(1-2ζ²)
 (ωn) √(1-1/ζ²)

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Control Systems
If a body has identical properties all over, it is known as

 isotropic.
 none of them.
 elastic.
 homogeneous.

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Control Systems
Transfer function of zero order hold response is

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

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Control Systems
Lead network is used to

 improve steady state response.
 both A and C.
 increase bandwidth.
 improve transient response.

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Control Systems
Resonant peak of a marginally stable system is

 any of the above
 finite value
 infinite
 0

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