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Electronic Devices - Communications

Exercise : Communications - General Questions
1.
A certain fiber-optic cable has the following characteristics: n1 = 1.82 and n2 = 1.73. What is the value of θc?
71.90º
0.95º
18.1º
1.81º
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
An AM demodulator can be implemented with a linear multiplier followed by a ________ filter.
low-pass
high-pass
band-pass
band-stop
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
The intermediate frequency in a standard AM receiver is
455 Hz.
455 kHz.
4.55 MHz.
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
In order for a light ray to propagate along a fiber-optic cable, what must the relationship be between the angle of incidence and the critical angle?
θi > θc
θi < θc
θi = θc
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
Light may be propagated along a fiber-optic cable in which of the following modes?
multimode step index
single-mode step index
multimode graded index
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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