Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

∇2 is
A:
vector
B:
scalar
C:
depend on direction
D:
none
Answer: B
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Two LOS antennas having power gains of G1 and G2 are separated transmitted power, Pr is received power turn Pr/Pt will be proportional to
A:
B:
C:
D:
Answer: A
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The absorption of EM wave by the atmosphere depends on
A:
polarization of waves
B:
frequency in use
C:
dist. from Ty
D:
height of antenna
Answer: B
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Poynting theorem relates the electric intensity E, magnetic intensity H to the rate of energy flow per unit area at a point P as
A:
P = E/H
B:
P = H/E
C:
E = 1/E x H
D:
P = E x H
Answer: D
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The gain of a current element is
A:
0 dB
B:
1.67 dB
C:
1.76 dB
D:
3 dB
Answer: C
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