Home / ECE / Exam Questions Paper :: Section 2

ECE :: Exam Questions Paper

  1. The z-transform of a signal converges if and only if


  2. If the characteristic equation of a closed loop system is s2 + 2s + 2, then the system is :

  3. A.
    over damped
    B.
    critically damped
    C.
    under damped
    D.
    undamped

  4. Given digits 2, 2, 3, 3, 3, 4, 4, 4, 4 how many distinct 4 digit numbers greater than 3000 can be formed?

  5. A.
    50
    B.
    51
    C.
    52
    D.
    54

  6. Consider circuit with 4 : 16 Demux below: Now:

    1. f1 = (2, 6, 11, 12)
    2. f2 = (2, 5, 14)
    3. = p(2, 3, 4, 5, 9, 13, 14)

  7. A.
    only 1 and 3 are correct
    B.
    only 1 is correct
    C.
    only 2 is correct
    D.
    2 and 3 are correct

  8. The value of the integral is


  9. The following circuit can be represented as :

  10. A.
    C
    B.
    f(A, B, C) = (0, 1, 2, 3, 4, 5, 6, 7)
    C.
    (A ⊕ B)C
    D.
    C

  11. A two port network is described by the relation
    V1 = 2I1 + 3V2
    I2 = - I1 + 2V2
    Then Z-parameter of such network is


  12. Calculate the stability factor and change in Ic from 25°C to 100°C for, β = 50, RB/RE = 250, ΔICO = 19.9 nA for emitter bias configuration

  13. A.
    42.553, 0.85 μF
    B.
    40.91, 0.58 μF
    C.
    38.53, 0.85 μF
    D.
    41.10, 0.39 μF

  14. The star equivalent C1 C2, C3 of the delta network is respectively


  15. In a radar system, the range of R1 is achieved at a frequency f1. Then the range R2 at frequency R2 = 8f1 would be __________ [Neglect effect of 1 on the Beam width.]

  16. A.
    R2 = R1
    B.
    R2 = 4R1
    C.
    R2 = 2R1
    D.
    R2 =