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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 5
26.
Distances near the skip distance should be used for sky-wave propagation
to avoid the Faraday effect
to avoid tilting
to prevent sky-wave and upper ray interference
so as to exceed the critical frequency
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
End fire array has a dipole spacing of λ/2.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Which one of following is correct for broadside array?
Direction of radiation is perpendicular to axis
Also perpendicular to the plane
Current is fed of equal amplitude equal phase
All
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The effective length of an antenna (Le) is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Curl of gradient A is
∇ x (∇A) = 1
∇ x (∇A) = ∞
∇ x (∇A) = 0
∇ x (∇A) = - ∞
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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