Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

The current distribution along a travelling wave antenna can be written in the form
A:
f(z) = f0e-jβz
B:
f(z) = f0 sin βz
C:
f(z) = f0
D:
f(z) = f0 cos (ωt - βz)
Answer: D
No answer description is available. Let's discuss.
Television signals are propagated as ground waves.
A:
True
B:
False
C:
D:
Answer: A
No answer description is available. Let's discuss.
Which of the following is a circularly polarized antenna?
A:
Rhombic
B:
Circular loop
C:
Helical
D:
Yagi
Answer: C
No answer description is available. Let's discuss.
When the height of a vertical earthed antenna is less than λ/4
A:
the base input impedance will be capacitive
B:
the base input impedance will be purely resistive
C:
the base input impedance will be inductive
D:
the base input impedance will be negligibly small
Answer: A
No answer description is available. Let's discuss.
If a wave is propagated in free space, it will be in nature of
A:
TE
B:
TM
C:
TEM
D:
Any one of above
Answer: C
No answer description is available. Let's discuss.
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