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ECE :: Automatic Control Systems

Automatic Control Systems - Section 1
Automatic Control Systems - Section 2
Automatic Control Systems - Section 3
Automatic Control Systems - Section 4
Automatic Control Systems - Section 5
Automatic Control Systems - Section 6
Automatic Control Systems - Section 7
Automatic Control Systems - Section 8
Automatic Control Systems - Section 9
Automatic Control Systems - Section 10
Automatic Control Systems - section-11

  1. Lag compensation increases bandwidth of the system.

    2. A.
    True
    B.
    False

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  2. Assertion (A): The time response of the system with will not have any overshoot for unit step input.

    Reason (R): A critically damped system does not have any overshoot to a unit step input.

    3. A.
    Both A and R are correct and R is correct explanation of A
    B.
    Both A and R are correct but R is not correct explanation of A
    C.
    A is correct but R is wrong
    D.
    R is correct but A is wrong

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  3. The polar plot of the given figure is for the term

    4. A.
    (jω)2
    B.
    1 + (jω)2
    C.
    D.

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  4. For the unity feed back system of the given figure, the closed loop transfer function is

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  5. The effect of negative feedback on distortion and bandwidth because

    6. A.
    both are decreased
    B.
    both are increased
    C.
    distortion is reduced and bandwidth is increased
    D.
    distortion is increased and bandwidth is decreased

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  6. Which of the following rotors are used in two phase ac servomotor?

    1. Solid iron rotor
    2. Squirrel cage rotor
    3. Drag cup rotor
    Of the above the correct ones are

    7. A.
    1, 2, 3
    B.
    1, 2
    C.
    2, 3
    D.
    1, 3

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  7. For the system of given figure the closed loop transfer function

    8. View Answer

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  8. Given figure shows a unity feedback system. The ratio of time constants for open loop and closed loop response are

    9. A.
    1 : 1
    B.
    2 : 1
    C.
    3 : 2
    D.
    2 : 3

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  9. For a second order system damping factor is 0.1. If ωd is frequency of damped oscillations and ωn is natural frequency, then

    10. A.
    ωd ≈ ωn
    B.
    C.
    ωn ≈ ωn
    D.
    ωd ≈ (ωn)2

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  10. For the block diagram of in the given figure, the transfer function C(s)/R(s) is

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