Home / ECE / Exam Questions Paper :: Section 12

ECE :: Exam Questions Paper

  1. To realize following function 'f'

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

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

  3. A uniform plane wave in air with H = 3 sin (ωt - 8x)uzA/m is incident normally on a region with σ = 0, μr = 1, εr = 9. The reflection coefficient is


  4. A memoryless source emits n symbols each with a probability p. The entropy of the source as a function of n

  5. A.
    increases as log n
    B.
    decreases as log (1/n)
    C.
    increases as n
    D.
    increases as n log n

  6. If (10) x x(10)x = (100)x; (100)x x (100)x = (10000)x then x can take value

  7. A.
    2
    B.
    5
    C.
    10
    D.
    All

  8. Assuming that flip-flops are in reset condition initially, the count sequence observed at QA in the circuit shown is

  9. A.
    0010111...
    B.
    0001011...
    C.
    0101111...
    D.
    0110100...

  10. The Taylor series expansion of at x = p is given by


  11. F = ∑(0, 3, 4, 5, 7) =

  12. A.
    [B ⊕ C] + AC
    B.
    B'C' + BC + AC
    C.
    AB + BC + CA
    D.
    None

  13. The matrix A is defined as A = . The eigen values of A2 are

  14. A.
    -1, -9, -4
    B.
    1, 9, 4
    C.
    1, 3, -2
    D.
    -1, -3, 2

  15. A uniform plane wave travelling in air is incident on the plane boundary between air and another dielectric medium with er = 15. The reflection coefficient for normal incidence is

  16. A.
    0.6 ∠0°
    B.
    1 ∠0°
    C.
    0.6 ∠180°
    D.
    1.2 ∠180°

  17. The system shown in figure remains stable when :

  18. A.
    k £ - 1
    B.
    -1 < k < 1
    C.
    l < k < 3
    D.
    k > 3