Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

Ionospheric storm causes an abnormal decrease in the critical frequency.
A:
True
B:
False
C:
D:
Answer: A
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The measure of mismatch between the load and the transmission line is known as
A:
directivity
B:
Gain
C:
standing wave ratio
D:
reflection coefficient
Answer: D
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A uniform wave have components
A:
in the perpendicular direction E existing while H is zero
B:
in the direction of propagation E existing while H is zero
C:
E and H are zero in direction perpendicular to direction of propagation
D:
E and H existing only in direction perpendicular to direction of propagation
Answer: D
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The radiation resistance of a resonant long wire antenna of half wavelength (λ/2) is given
A:
73 Ω
B:
120 p
C:
377 Ω
D:
7.3 Ω
Answer: A
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A medium is said to be isotropic when
A:
∈ = 0
B:
∈ = μ
C:
∈ = σ
D:
∈ is scalar constant
Answer: D
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