Menu
Home / ECE / Electromagnetic Field Thoery :: Section 6

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. End fire coupler is formed

    2. A.
    when two equal radiators are operated in phase quadrature at a distance of λ/4 apart
    B.
    when two equal radiators are operated in parallel at a distance of λ/4 apart
    C.
    when two equal radiators are operated in phase quadrature at a distance of λ/2 apart
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  2. Antenna radiation efficiency can be increased by

    3. A.
    reducing radiation resistance of the system
    B.
    increasing radiation resistance of the system
    C.
    providing effective earthing
    D.
    any of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  3. Divergence of curl A is

    4. A.
    ∇ . (∇ x A) = 1
    B.
    ∇ . (∇ x A) = 0
    C.
    ∇ . (∇ x A) = ∇
    D.
    ∇ . (∇ x A) = - ∞

    View Answer

    Workspace

    Discuss Discuss in Forum

  4. The energy stored in a magnetic field is given by

    5. View Answer

    Workspace

    Discuss Discuss in Forum

  5. If reflection coefficient is 1/5, then corresponding VSWR is given by

    6. A.
    1
    B.
    2
    C.
    3
    D.
    3/2

    View Answer

    Workspace

    Discuss Discuss in Forum

  6. The characteristic impedance is given by

    7. A.
    B.
    C.
    Z0 = Zoc . Zsc
    D.

    View Answer

    Workspace

    Discuss Discuss in Forum

  7. Surface integral of the electric field intensity is

    8. A.
    differential of volume flux
    B.
    electrical charge
    C.
    net flux emanating from the surface
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  8. The essential condition for antenna array to be linear is that

    9. A.
    individual antennas of the array must be of equal size
    B.
    individual antennas of the array must be equally spaced along a straight line
    C.
    any two individual antennas of the array must not be in the same direction
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  9. Directivity gain depends on

    10. A.
    the distribution of radiated power in space
    B.
    solid angle of the radiated field pattern
    C.
    both (a) and (b)
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum

  10. The fluctuation in the received signal strength at the receiver of a random variation in the received signal is known as

    11. A.
    fluctuation
    B.
    fading
    C.
    absorption
    D.
    cycling

    View Answer

    Workspace

    Discuss Discuss in Forum

Java Programming Questions and Answers Interview Questions and Answers