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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. The Transverse electric wave traveling in z-direction satisfies which of the following equation
    2. A.
    Ez = 0 , Hz = 0
    B.
    Ez = 0 , Hz ≠ 0
    C.
    Ez ≠ 0 , Hz = 0
    D.
    Ez ≠ 0 , Hz ≠0

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  2. The intrinsic impedance of free space is
    3. A.
    75 ohm
    B.
    73 ohm
    C.
    120 ohm
    D.
    377 ohm

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  3. Pick the odd one out with respect to equipotential surface
    4. A.
    Potential is same every where
    B.
    Work done in moving charge from one point to another is zero
    C.
    Potential is different every where
    D.
    No current flows on this surface

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  4. Which of the following matching is incorrect
    5. A.
    Ampere's circuital law -
    B.
    Displacement current density -
    C.
    Poisson's equation - ∇2 V = 0
    D.
    Continuity equation -

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  5. A wave is incident normally on a good conductor. If the frequency of a plane electromagnetic wave increases four times, the skin depth will
    6. A.
    increase by a factor of 2
    B.
    decrease by a factor of 4
    C.
    remain the same
    D.
    decrease by a factor of 2

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  6. The ratio of conduction current density to the displacement current density is
    7. A.
    σ / j ω∈
    B.
    jσ / ω∈
    C.
    σω / j∈
    D.
    σ ∈ / j ω

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  7. In a travelling electromagnetic wave, E and H vector fields are
    8. A.
    Perpendicular in space
    B.
    Parallel in space
    C.
    E is in the direction of wave travel
    D.
    H is in the direction of wave travel

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  8. When two vectors are perpendicular, their
    9. A.
    Dot product is zero
    B.
    Cross product is zero
    C.
    Both are zero
    D.
    Both are not necessarily zero

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  9. The cross product of the vectors 3i + 4j “ 5k and “i + j “ 2k is,
    10. A.
    3i "“ 11j + 7k
    B.
    -3i + 11j + 7k
    C.
    -3i "“ 11j "“ 7k
    D.
    -3i + 11j "“ 7k

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  10. Which of the following are not vector functions in Electromagnetics?
    11. A.
    Gradient
    B.
    Divergence
    C.
    Curl
    D.
    There is no non- vector functions in Electromagnetics

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