Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

The reflection coefficient is generally a
A:
complex number
B:
fraction
C:
imaginary number
D:
none of the above
Answer: A
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What will be the propagation constant at 10 MHz?
A:
3.4 radians/km
B:
34.4 radians/km
C:
344 radians/km
D:
3440 radians/km
Answer: C
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The advantage of Marconi antenna over the ungrounded antenna is that
A:
only one fourth of the height is required as compared to undergrounded antenna
B:
one-half of the height is required as compared to undergrounded antenna
C:
no capacitance required
D:
none of the above
Answer: B
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An antenna couple is used due to all of the following reasons except
A:
to prevent reradiation of the local oscillator
B:
to discriminate against harmonics
C:
to make the antenna look resistive
D:
to provide the output amplifier with the correct load impedance
Answer: A
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__________ acts as a depolarizer in a dry cell.
A:
ammonium chloride
B:
carbon powder
C:
manganese dioxide
D:
zinc chloride
Answer: C
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