Menu
Home / ECE / Electromagnetic Field Thoery :: Section 10

ECE :: Electromagnetic Field Thoery

Electromagnetic Field Thoery - Section 1
Electromagnetic Field Thoery - Section 2
Electromagnetic Field Thoery - Section 3
Electromagnetic Field Thoery - Section 4
Electromagnetic Field Thoery - Section 5
Electromagnetic Field Thoery - Section 6
Electromagnetic Field Thoery - Section 7
Electromagnetic Field Thoery - Section 8
Electromagnetic Field Thoery - Section 9
Electromagnetic Field Thoery - Section 10
Electromagnetic Field Thoery - Section 11
Electromagnetic Field Thoery - Section 12
Electromagnetic Field Thoery - Section 13
Electromagnetic Field Thoery - section-14
Electromagnetic Field Thoery - section-15

  1. Virtual height of an ionospheric layer is always greater than its actual height.

    2. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. In waveguides the existing waves are

    3. A.
    TE only
    B.
    TM only
    C.
    both (a) and (b)
    D.
    all of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. The term __________ applies to troposcatter propagation

    4. A.
    fading
    B.
    Faraday rotation
    C.
    SIDS
    D.
    atmospheric storms

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. Unit of e is __________ .

    5. A.
    coulomb/newton-metre
    B.
    coulomb2/newton-metre
    C.
    Farad/metre
    D.
    Farad2/metre

    View Answer

    Workspace

    Discuss Discuss in Forum

  5. So-called 'grounded' antennas are often found insulated from the ground electrically.

    6. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. End fire array is called a linear resonant dipole array.

    7. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. Which of the following statements is incorrect regarding Balun transformer?

    8. A.
    It changes impedance like current transformer
    B.
    It changes balanced to unbalanced line
    C.
    It is used to couple a co-axial line to a parallel line wire
    D.
    Any of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  8. The maximum usable frequency for the 'E' layer is 10 MHz.

    9. A.
    True
    B.
    False

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. In free space

    10. A.
    phase velocity is greater than light velocity
    B.
    phase velocity is equal to group velocity
    C.
    phase velocity is equal to light velocity
    D.
    Both (b) and (c)

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. Laplacian of a scalar function V is

    11. A.
    gradient of V
    B.
    gradient of the gradient of V
    C.
    divergence of V
    D.
    divergence of the gradient of V

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers