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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. In a rectangular waveguide ZTE . ZTM is

    2. A.
    η02
    B.
    1
    C.
    1/ η02
    D.
    η0

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  2. Brewster angle is the angle for which there is

    3. A.
    no reflection and the incident wave is vertically polarized
    B.
    reflection and the incident wave is horizontally polarized
    C.
    no reflection and the incident wave is horizontally polarized
    D.
    none of the above

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  3. Surface waves can propagate on Piezoelectric substrates.

    4. A.
    True
    B.
    False

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  4. For an antenna radiation and induction fields are

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  5. A folded dipole antenna is conveniently connected to

    6. A.
    shielded line
    B.
    two wire line
    C.
    coaxial line
    D.
    flat ribbon type transmission line

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  6. The "boundary sphere" between antenna region and free space region appears to "opaque"

    7. A.
    along the dipole axis
    B.
    along perpendicular direction
    C.
    along the dipole axis as well as perpendicular direction
    D.
    neither along the dipole axis nor along the perpendicular direction

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  7. In a horizontal polarized wave

    8. A.
    magnetic field is perpendicular to ground
    B.
    magnetic field component is parallel to ground
    C.
    electric field component is perpendicular to ground
    D.
    electric field is parallel to ground

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  8. For a uniform plane wave of frequency 106 Hz propagating in a good conductor, the field undergoes a change in phase by 2p radius over a distance of 1 meter. The field is attenuated by a factor of 1/e at a distance of

    9. A.
    m
    B.
    m
    C.
    p m
    D.
    2p m

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  9. T.V. broadcasting based on

    10. A.
    line of sight communication
    B.
    ionospheric propagation
    C.
    ground wave
    D.
    medium wave

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  10. Absolute permeability (μ) is given by __________ henry/metre

    11. A.
    4p x 10-12
    B.
    4p x 10-7
    C.
    8.854 x 10-12
    D.
    8.854 x 10-7

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