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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

 3
 2
 1
 0

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Control Systems
Lowest critical frequency is due to zero and it may be present at the origin or nearer to the origin, then the type of network is

 RC circuit.
 LC circuit.
 RL Circuit.
 RLC circuit.

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

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

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Control Systems
Error at corner frequency ωcf of first order control system is -------

 ±4 db
 ±3 db
 ±1 db
 ±2 db

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Control Systems
A function y (t) satisfies the following differential equation : Where, δ (t) is the delta function. Assuming zero initial condition and denoting the unit step function by u(t), y(t) can be formed as

 e-t.
 et.
 e-tu(t).
 etu(t).

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

 1/(s+1)
 1/s(s+1)
 s/(s+1)
 1/s

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