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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. Maxwell's divergence equation for the magnetic field is given as

    2. A.
    ∇ . B = 0
    B.
    ∇2 . B = 0
    C.
    ∇ . B = constant
    D.
    ∇2 . B = constant

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  2. Which antenna is a wideband antenna?

    3. A.
    Hertz antenna
    B.
    Marconi antenna
    C.
    Folded dipole
    D.
    None of the above

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  3. The radiation pattern of loop antenna is

    4. A.
    circle
    B.
    semicircle
    C.
    elliptical
    D.
    cardoid or Limacon

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  4. Maxwell's curl equation for the static electric field E can be expressed as

    5. A.
    Δ x E = 0
    B.
    Δ x E = constant
    C.
    Δ - E = constant
    D.
    Δ . E = 0

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  5. The unit of ∇ x H is

    6. A.
    Ampere
    B.
    Ampere/meter
    C.
    Ampere/m2
    D.
    Ampere-meter

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  6. The relative permittivity of the ionosphere at ratio frequencies is

    7. A.
    > 1
    B.
    < 1
    C.
    = 1
    D.
    ≥ 1

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  7. Tropospheric scatter propagation is not subject to any fading.

    8. A.
    True
    B.
    False

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  8. The attenuation in waveguide above to cut off frequency

    9. A.
    very high
    B.
    very low
    C.
    zero
    D.
    infinite

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  9. VSWR is related with reflection co-efficient as

    10. A.
    B.
    C.
    VSWR = 1 + |k|
    D.
    VSWR = 1 - |k|

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  10. When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon

    11. A.
    the value of current
    B.
    the weight of the conductor
    C.
    the direction of the conductor
    D.
    none of the above

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