Home / ECE / Exam Questions Paper :: Section 13

ECE :: Exam Questions Paper

  1. For a given data rate, the bandwidth required with M-array PSK transmission is smaller than that of a binary transmission by

  2. A.
    log2M
    B.
    C.
    D.

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. In a microprocessor, the service routine for a certain interrupt starts from a fixed location of memory which cannot be externally set, but the interrupt can be delayed or rejected. Such an interrupt is

  4. A.
    non-maskable and non-vectored
    B.
    maskable and non-vectored
    C.
    non-maskable and non-vectored
    D.
    maskable and vectored

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. Which one of the following statements is not correct with regard to power amplifiers?

  6. A.
    The collector current is large
    B.
    They are used as the front end of multi-stage amplifiers
    C.
    They are used near the end of the multi-stage amplifiers
    D.
    They have a high power rating

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. Which of the following cannot provide as much time interval accuracy as the oscilloscope but can capture and display eight or more signals simultaneously, something that scopes cannot do?

  8. A.
    Logic analyzer
    B.
    Digital oscilloscope
    C.
    Frequency analyzer
    D.
    Wave analyzer

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. A DC voltage source is connected across a series R - L - C circuit. Under steady-state conditions, the applied DC voltage drops entirely across the

  10. A.
    R only
    B.
    C only
    C.
    L only
    D.
    R and L combination

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. Consider the voltage transfer characteristic of a standard CMOS inverter

    where region A corresponds to

  12. A.
    NMOS and PMOS triode
    B.
    Both are saturation
    C.
    NMOS saturated PMOS linear
    D.
    None of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. Assertion (A): Ideal current sources and ideal voltage sources do not exist in reality.

    Reason (R): All sources have finite internal impedances.

  14. A.
    Both A and R are individually true and R is the correct explanation of A
    B.
    Both A and R are individually true but R is not the correct explanation of A
    C.
    A is true but R is false
    D.
    A is false but R is true

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. A signal occupies a band 5 kHz to 10 kHz. For proper error free reconstruction at what rate it should be sampled?

  16. A.
    10 kHz
    B.
    20 kHz
    C.
    5 kHz
    D.
    (10 + 5) x 2 kHz

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. Which of the following circuits come under the class of combinational logic circuits?

    1. Full adder
    2. Full subtractor
    3. Half adder
    4. J-K flip-flop
    5. Counter
    Select the correct answer from the codes given below:

  18. A.
    1 only
    B.
    3 and 4
    C.
    4 and 5
    D.
    1, 2 and 3

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. Consider a 565 PLL with RT = 10 kΩ and CT = 0.01 μF. What is the output frequency of the VCO?

  20. A.
    10 kHz
    B.
    5 kHz
    C.
    2.5 kHz
    D.
    1.25 kHz

    View Answer

    Workspace

    Discuss Discuss in Forum