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Control Systems

Control Systems
What is the order of a closed loop control system for a plant with a transfer function equal to G(s) = k/s²(1+Ts) and with unity feedback

 0
 3
 2
 1

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Control Systems
The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If gain k is increased to infinity, then damping ratio will tend to become

 infinite
 zero
 unity
 0.707

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Control Systems
Time taken for the response to rise from zero to 100 % for very first time is called

 Rise time.
 Delay time.
 Peak time.
 Settling time.

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

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

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Control Systems
By using which of the following elements, mechanical translational systems are obtained?

 mass element
 spring element
All of these
 dash-pot

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Control Systems
A second order control system has F(jω) = 100/(100 - ω² + 10√2 jω). Find the resonant peak?

 0.5
 1
 1.5
 0.707

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