21 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 wavelengthfrom 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 Z_{0}2. In an impedance that is infinite 3. In an inductive reactance greater than Z_{0}4. In a capacitive reactance greater than Z_{0}