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ECE :: Exam Questions Paper

  1. For the circuit shown in figure below, the initial conditions are zero, its transfer function H(s) = is :

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  3. For the two-port network shown below, the short circuit admittance parameter matrix is

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  5. The circuit given below:

    If R1 = R2 = 20 kΩ and C1 = 0.2 μF and C2 = 0.005 μF. Then which of the given statements given below is true?

  6. A.
    Circuit is band stop with two edge frequency of 39.7875 Hz to 1592 Hz
    B.
    Circuit is band pass with two edge frequency of 39.7875 Hz to 1592 Hz
    C.
    Circuit is oscillator, oscillation at two frequencies 39.7875 Hz to 1592 Hz depending on R3, R4, R5 and R6
    D.
    None of these

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  7. The Nyquist sampling rate for the signal s(t) = is given by

  8. A.
    400 Hz
    B.
    600 Hz
    C.
    1200 Hz
    D.
    1400 Hz

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  9. The question below consists of a pair of related words followed by four pairs of words. Select the pair that best expresses the relation in the original pair.
    Unemployed: Worker

  10. A.
    fallow : land
    B.
    unaware : sleeper
    C.
    wit : jester
    D.
    renovated : house

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  11. An FM transmitter delivers 80W to a load of 30 W when no modulation is present. The carrier is now frequency modulated by a single sinusoidal signal and the peak frequency deviation is so adjusted to make the amplitude of the second sideband is zero in the given output.
    J0(0, 0) = 1,
    J0(2, 4) = 0,
    J0(3.8) = - 0.4,
    J0(5.1)= - 0.1
    J1(2, 4) = 0.52,
    J1((3.8) = 0,
    J1(5.1) = - 0.33,
    J2(2.4) = 0.1
    J2(3.8)= 0.41,
    J2(5.1) = 0
    Power in the first order sidebands is :

  12. A.
    5.12 W
    B.
    21.78 W
    C.
    2.56 W
    D.
    16.81 W

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  13. For a binary symmetric channel, the error probability Pc(0) = Pc(1) = and errors are statistically independent. The channel capacity for a signalling speed 2 bits/second.

  14. A.
    2 bits/sec
    B.
    1.69 bits/sec
    C.
    4 bits/sec
    D.
    1 bit/sec

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  15. Figure below shows D type Flip-Flops connected as shift register, then outputs QD, QC, QB, QA are given by:

  16. A.
    1 and 2 only
    B.
    2 and 3 only
    C.
    1, 2 and 3
    D.
    none of these

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  17. To realize following function 'f',

    How many minimum number of 2 input NAND gates are required?

  18. A.
    3
    B.
    6
    C.
    4
    D.
    10

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  19. Given L[f(t)] = and L[g(t)] = also h(t) = , where, x = then, L[h(t)] = __________ .

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