3-J-064: Voltage, Current and Power Relationships
3-64J1:
What is the current flowing through a 52 ohm line with an input of 1,872 watts?
6 amps.
0.06 amps.
28.7 amps.
144 amps.
3-64J2:
The voltage produced in a receiving antenna is:
Always proportional to the received field strength.
Out of phase with the current if connected properly.
Out of phase with the current if cut to 1/3 wavelength.
Variable depending on the station’s SWR.
3-64J3:
Which of the following represents the best standing wave ratio (SWR)?
1:1.
1:1.5.
1:3.
1:4.
3-64J4:
At the ends of a half-wave antenna, what values of current and voltage exist compared to the remainder of the antenna?
Maximum voltage and minimum current.
Equal voltage and current.
Minimum voltage and maximum current.
Minimum voltage and minimum current.
3-64J5:
An antenna radiates a primary signal of 500 watts output. If there is a 2nd harmonic output of 0.5 watt, what attenuation of the 2nd harmonic has occurred?
30 dB.
10 dB.
40 dB.
50 dB.
3-64J6:
There is an improper impedance match between a 30 watt transmitter and the antenna, with 5 watts reflected. How much power is actually radiated?
25 watts.
35 watts.
30 watts.
20 watts.
|
Color key:
|
|
● = Unseen
|
|
● = Weak
|
|
● = Review
|
|
● = Learned
|
|
● = Incorrect answer
|
