Please help me to solve five of the questions that I miss on the electronics technician test. Thanks in advance.
Marvin
1) What is the resistance of a 1000ft of # 10 copper wire without using the AWG chart. rho is given of 10.370 ohm?
2) Which of the following wire will safely carry the most current?
0, 10, 30, 40, -10
Is wire #0 or #10? Since I don't see the value of the current on the chart, I hesitage to choose wire#0 even I acknowdge that the smaller the wire size the higher the current. (I chose wire #10) AWG #10 has 14.8A which is the highest current among the numbers 30, 40 on the chart.
3) The resistor of 10Ω has a current equal 1/10A, choose the smallest composition resistor rating:
1/4w, 1/2w, 1w, 2w, None.
Is the answer None? because the lowest power rating is calculated by P = I^2 x R
P= (.1)^2 x 10
= .01 x 10 = .1w
4) When align RF receiver, which stage is tuned first?
Mixer, IF, RF, doen't matter.
5) What is ohm value of a good condenser?
infinitive
50000 100000 ohms
50 100 ohm
Zero
Non of above
Is the answer infinitive Ω?
Marvin
1) What is the resistance of a 1000ft of # 10 copper wire without using the AWG chart. rho is given of 10.370 ohm?
2) Which of the following wire will safely carry the most current?
0, 10, 30, 40, -10
Is wire #0 or #10? Since I don't see the value of the current on the chart, I hesitage to choose wire#0 even I acknowdge that the smaller the wire size the higher the current. (I chose wire #10) AWG #10 has 14.8A which is the highest current among the numbers 30, 40 on the chart.
3) The resistor of 10Ω has a current equal 1/10A, choose the smallest composition resistor rating:
1/4w, 1/2w, 1w, 2w, None.
Is the answer None? because the lowest power rating is calculated by P = I^2 x R
P= (.1)^2 x 10
= .01 x 10 = .1w
4) When align RF receiver, which stage is tuned first?
Mixer, IF, RF, doen't matter.
5) What is ohm value of a good condenser?
infinitive
50000 100000 ohms
50 100 ohm
Zero
Non of above
Is the answer infinitive Ω?