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Control Systems

Control Systems
A open loop transfer function is given as G(s) = (s+2)/(s+1)(s-1). Find the number of encirclements about '-1+j0'?

 2
 0
 3
 1

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Control Systems
The impulse response of a linear system is e-t, (t > 0). The corresponding transfer function is

 s/(s+1)
 1/(s+1)
 1/s(s+1)
 1/s

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Control Systems
Electrical analogous quantity for dash-pot in force-current analogy is

 resistance.
 inductance.
 capacitance.
 conductance.

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Control Systems
Which of the following is the electrical analogous element for displacement in force-voltage analogy?

 Charge.
 Voltage.
 Flux.
 Current.

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Control Systems
A proportional plus derivative controller

 has high sensitivity
 both 1 and 2
 increases the stability of the system
 improves the steady state accuracy

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Control Systems
The transfer function of the control system depends on

 initial conditions of input and output.
 nature of the input.
 the system parameters alone.
 nature of the output.

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