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Electromagnetic Field Theory

Electromagnetic Field Theory
Ohm’s law in point from field theory can be expressed as

 J = σE.
 R = ρ × ( l / A).
 J = E / σ.
 V = IR.

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Electromagnetic Field Theory
The field at any point on the axis of a current carrying coil will be

 zero.
 parallel to axis.
 at angle of 45° with the axis.
 perpendicular to the axis.

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Electromagnetic Field Theory
Tropospheric scatter propagation is not subject to any fading.

True
False

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Electromagnetic Field Theory
The main purpose of choke is

 to block low frequencies.
 to pass high frequencies.
 none of above.
  to pass low frequencies.

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Electromagnetic Field Theory
It is best to use for coupling a coaxial line to a parallel wire transmission line.

Tee
Balun
Slotted line
Directional Coupler

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Electromagnetic Field Theory
In case of surface waves the field strength at a point is directly proportional to

Distance of the point from the antenna
Wave frequency
Antenna height
Current of the antenna

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MORE MCQ ON Electromagnetic Field Theory

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