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3-47. In an open-ended transmission line with
an ac signal applied, what is the phase
relationship between the incident and
reflected voltage waves?
1. In phase
2. 45 degrees out of phase
3. 90 degrees out of phase
4. 180 degrees out of phase
3-48. The resultant of the incident and reflected
voltage waves is called the standing wave.
Its value is figured by using which of the
following procedures?
1. Adding the effective values of the two
waveforms
2. Algebraically adding the instantaneous
values of the two waveforms
3. Algebraically subtracting the
instantaneous values of the two
waveforms
4. Taking the square root of the product
of the incident and reflected voltages
3-49. On an open-ended transmission line that is
carrying an ac signal, what is the total
number of moving voltage waves?
1. One
2. Two
3. Three
4. Four
3-50. At the end of an open-ended transmission
line, which, if any, of the following
voltage waves is at its maximum value?
1. Incident
2. Reflected
3. Resultant
4. None
3-51. On a transmission line that is carrying an
ac signal, what is the relative value of the
resultant voltage wave 1/4 wavelength
from the open end?
1. Maximum positive
2. Maximum negative
3. Zero
3-52. In an open-ended transmission line, the
resultant ac current waveform is always
zero at what point(s)?
1. At the open end only
2. 1/2 wavelength from the open-end only
3. At the open end and 1/2 wavelength
from the open-end
3-53. The resultant waveform obtained by
adding the incident wave to the reflected
wave is referred to as a/an
1. standing wave
2. negative wave
3. algebraic wave
4. concentrated wave
3-54. On an open-ended transmission line, what
is the phase relationship between the
standing waves of voltage and current?
1. In phase
2. 45 degrees out of phase
3. 90 degrees out of phase
4. 180 degrees out of phase
3-55. Which of the following conditions exist at
the end of a shorted transmission line?
1. Maximum voltage and minimum
current
2. Maximum voltage and maximum
current
3. Minimum voltage and maximum
current
4. Minimum voltage and minimum
current
3-56. Transmission line is considered to be
nonresonant (flat) when it is terminated in
which of the following ways?
1. In an impedance equal to Z0
2. In an impedance that is infinite
3. In an inductive reactance greater than
Z0
4. In a capacitive reactance greater than
Z0
