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Electromagnetic Field Theory

Electromagnetic Field Theory
If a and b are the dimensions of waveguide then

a = b
a = 2b
a = b/4
a = 3b

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Electromagnetic Field Theory
Tropospheric scatter is used with frequencies in the

VHF
UHF
HF
VLF

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Electromagnetic Field Theory
Which of following can induce the maximum induced voltage ?

 20 amp dc.
 1 amp dc.
 1 amp 1 Hz.
 1 amp 100 Hz.

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Electromagnetic Field Theory
The radiation pattern of a parabola antenna is

Highly directional
A figure of directional
None of these
Omnidirectional

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Electromagnetic Field Theory
The critical frequency of ‘F’ layer is greater than 30 MHz.

True
False

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Electromagnetic Field Theory
What is the value of total electric flux coming out of a closed surface?

 Equal to the surface charge density.
 Zero.
 Equal to total charge enclosed by the surface.
 Equal to volume change density.

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MORE MCQ ON Electromagnetic Field Theory

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