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Control Systems

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
 8
 2
 4

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Control Systems
Find the stability for the following transfer function G(s) = 50/s(s+5) ?

 Marginally stable
 Unstable
 Critically stable
 Stable

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Control Systems
For a unity feedback control system open loop transfer function then position error constant is

 40.
 20.
 0.
 infinity.

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Control Systems
Which of the following transfer functions represent under damped second order systems?

All of these
 1/(s² + s + 1)
 2/(s² + 2s + 2)
 4/(s² + 2s + 4)

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Control Systems
Which of the following combinations is/are correct electrical analogous elements in force-current analogy?

 Force (f) --------------------- Current (i)
 Spring element (K) --------- Inverse inductance (1/L)
 Velocity (v) ----------------- Voltage (V)
All of these

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Control Systems
Which of the following is/are the disadvantages of an open loop control system?

None of these
 Unreliable.
 Inaccurate.
 both 1 and 2.

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