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ECE :: Exam Questions Paper

  1. The Z inverse of the given Z transform is :

  2. A.
    unit step
    B.
    unit impulse
    C.
    unit ramp
    D.
    unit parabola

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  3. The RMS value of the signal given below is:

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  5. Use block diagram reduction methods to obtain the equivalent T.F from R to C.

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  7. Find E at P(1, 1, 1) caused by four identical 3 nC point charges located at P1(1, 1, 0), P2(- 1, 1, 0), P3(- 1, - 1, 0) P4(1, - 1, 0)

  8. A.
    21.58ax + 21.58ay + 12az V/m
    B.
    6.82ax + 6.82ay + 32.89az V/m
    C.
    -6.82ax - 6.82ay - 32.89az V/m
    D.
    -21.58ax - 21.58ay - 12az V/m

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  9. In the interconnection of ideal sources shown in the figure, it is known that the 60V source is absorbing power

    Which of the following can be the value of the current source?

  10. A.
    10 A
    B.
    13 A
    C.
    15 A
    D.
    18 A

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  11. For the network shown below, if VD = 12 V and VGSQ = - 2 V value of RS will be

  12. A.
    13.35 kΩ
    B.
    3.35 kΩ
    C.
    33.31 kΩ
    D.
    3.95 kΩ

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  13. The causal system given below is __________

  14. A.
    minimum phase
    B.
    maximum phase
    C.
    mixed phase
    D.
    none of these

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  15. Find RL for maximum power transfer.

  16. A.
    3 Ω
    B.
    1.125 Ω
    C.
    4.1785 Ω
    D.
    None of these

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  17. The probability density function (PDF) of a random variable X is as shown below

    The corresponding cumulative distribution function (CDF) has the form

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  19. The system with given pole-zero diagram is __________

  20. A.
    Causal
    B.
    Anti-causal
    C.
    Both sided
    D.
    Cannot be determined

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