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Electromagnetic Field Theory
Electromagnetic Field Theory
Exercise: Electromagnetic Field Theory
📂 Electromagnetic Field Theory
✅
Questions for: Electromagnetic Field Theory
A plane EM wave is travelling in an unbound loss less dielectric having μ
y
= 1 and ε
y
= 4, the time average Poynting vector of the wave is 5 W/m
3
. The phase velocity
v
p
(assuming velocity of light as 3 x 10
8
m/sec) is
A:
1.5 x 10
8
m/sec
B:
3 x 10
8
m/sec
C:
2.5 x 10
8
m/sec
D:
0.5 x 10
8
m/sec
Answer:
A
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Post
The wave propagation occurs without attenuation in case of a
A:
conductor
B:
semiconductor
C:
perfect dielectric
D:
none of the above
Answer:
C
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Post
The numerical value of directive gain may lie between
A:
1 and + 1
B:
0 and 1
C:
0 and ∞
D:
1 and ∞
Answer:
C
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Post
Laplacian of a scalar function
v
is
A:
gradient of
v
B:
divergence of
v
C:
gradient of the gradient of
v
D:
divergence of the gradient of
v
Answer:
D
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Post
Antenna is a __________ element
A:
passive
B:
active
C:
resistive
D:
capacitive
Answer:
A
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