Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

Purpose of antenna is
A:
to transmit and receive energy
B:
to convert EM into electrical
C:
to convert electrical into EM
D:
all of the above
Answer: D
No answer description is available. Let's discuss.
Which of following antenna not produces circular polarisation?
A:
Helical
B:
Parabolic
C:
Disc
D:
Yagi
Answer: D
No answer description is available. Let's discuss.
The electric intensity for free space is given by
A:
ε0d
B:
σ/ε0
C:
σ.ε0
D:
d0
Answer: C
No answer description is available. Let's discuss.
When a plane wave is incident normally from dielectric '1' (μ0, ε1) onto dielectric '2' (μ0, ε2) the electric field of the transmitted wave is 2 times the electric field of the reflected wave. The ratio ε21 is
A:
0.5
B:
1
C:
2
D:
4
Answer: D
No answer description is available. Let's discuss.
The curve representing Ohm's law is
A:
linear
B:
a parabola
C:
a hyperbola
D:
sine function
Answer: A
No answer description is available. Let's discuss.
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