20
3-42. When a transmission line is not terminated
in its characteristic impedance (Z0), what
happens to the incident energy that is NOT
transferred to the load?
1. It is returned along the transmission
line
2. It is radiated into space
3. It is absorbed by the line
4. It is converted to heat energy
Figure 3-D.—Open-ended transmission line.
IN ANSWERING QUESTIONS 3-43 AND 3-44,
REFER TO FIGURE 3-D.
3-43. When the dc voltage reaches the open end
of the transmission line in the figure and is
reflected, it has which, if any, of the
following changes?
1. Increased amplitude
2. Decreased amplitude
3. The opposite polarity
4. None of the above
3-44. When the dc current reaches the open end
of the transmission line and is reflected, it
has which, if any, of the following
changes?
1. Increased amplitude
2. Decreased amplitude
3. The opposite polarity
4. None of the above
Figure 3-E.—Short-circuited transmission line.
IN ANSWERING QUESTIONS 3-45 AND 3-46,
REFER TO FIGURE 3-E.
3-45. When the dc voltage reaches the shorted
end of the transmission line, it is reflected.
It has which, if any, of the following
changes?
1. Increased amplitude
2. Decreased amplitude
3. The opposite polarity
4. None
3-46. When the dc current reaches the shorted
end of the transmission line, it is reflected.
It has which, if any, of the following
changes?
1. Decrease amplitude
2. Increase amplitude
3. Increased polarity
4. None of the above
