TEST

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Re: TEST

1 = If the function/range switch is set at 200 VAC, what will the multimeter read if a measurement is made directly across both terminal of a good fuse or circuit breaker in a 120 VAC line ?

Would it be =(0 VAC) = (120 VAC ) (200 VAC)
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The answer is 0 volts. Here you have a parallel circuit. The meter is in parallel with the unblown fuse. A parallel circuit is a current divider so the voltage applied to both sources will be the same.

2 = If the function/range switch is set at 200 VAC, what will the multimeter read if a measurement is made directly across both terminal of a Blown fuse or tripped circuit breaker in a 120 VAC line

Would it be =(0 VAC) = (120 VAC ) (200 VAC)
Click to expand...
Here you would read 120 volts because the meter is now in series with the conductor and a series circuit is a voltage divider hence the voltage reading. The fuse being blown causes there to be a difference in potential between the two parts.

This is what the forum has been trying to get you to understand!!!!!!!

Now I have a question for you. How much theory have you had in class?
:p

Edited to fix the voltage to 120. got so Aggravated at the lack of knowledge

[ October 02, 2005, 12:16 AM: Message edited by: jwelectric ]
 
Re: TEST

Aggravated at the lack of knowledge
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Don't be aggravated at the lack of knowledge - he's been in the business for 2 months. I could almost rope a circuit wrong in two months time. :D

I am aggravated he expected (and received) the answer to his test without doing as we've asked: discussing what's going on when the "switch" or "fuse" is on.

Anyway, Rawvie, do you understand what we're saying, about both test leads on the same conductor?
 
Re: TEST

Hi i just stat a Pc Repair technician course and right now i'm in Power Supplies i do not know nothing about electricity that why i came in this forum i am sorry if i aggravated you and i thanks you
Rawvie
 
Re: TEST

Let me take a moment to explain that you have come to the right place for your answers. Everyone was trying to get you to figure the circuit yourself. I could see that you was as lost as a June bug in a whirlwind and couldn?t see what was going on if someone was holding a flashlight for you.

With no more experience than you have you should never try testing a live circuit. Next time try and figure the scenario out by thinking through the process. Listen to what is being said and at least try to figure out one at a time. What I saw was you just guessing at the answer.

Electricity is a no guessing game. Guess wrong one time and there might not be no more Rawvie.

I will help you in any way I can my little buddy.
 
Re: TEST

Originally posted by rawvie:
For what i learn in order to get a reading in parallel you must first disconnect the device from the circuit here the say the fuse or circuit breaker in a 120 VAC line does it mean connect from the circuit
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I'm sorry, I can't make sense of what you're saying here. :(

But, on the bright side, I brought pictures. :D
Rawvie.jpg

There has to be a difference in potential for the meter to see a difference.

The meter is designed to detect a difference between the red lead, and the black lead. In the left scenario, you have an ungrounded ("hot") conductor touching the red lead. The black lead is touching the load, which is connected to the neutral.

There is a difference in potential between these two conductors.

On the right side, the switch has been closed (turned on). The leads haven't moved. But now the meter reads zero. Why?

Because they are on the same conductor now. There is no difference to detect.

Do you understand?
 
Re: TEST

Hi guy thanks to all of you specialy to you georgestols for your drawing i pass my multimeter exam here is the prof
thanks to all
Rawvie

HomeExam Results



Exam Results
MULTIMETER OPERATIONS

Please print a copy of this evaluation if you wish to retain it for your records. This exam will be available for you to view and print for 30 days only.
Student Number 89758674
Date Graded 10/02/05
Examination 07900200
Grade 100


--------------------------------------------------------------------------------

Question Number Your Answer Answer Reference


1 C Correct
2 B Correct
3 A Correct
4 B Correct
5 D Correct
6 B Correct
7 D Correct
8 D Correct
9 B Correct
10 C Correct
11 D Correct
12 B Correct
13 A Correct
14 B Correct
15 D Correct
16 C Correct
17 B Correct
18 B Correct
19 B Correct
20 A Correct


Your work on this test was perfect. We expect that you will continue to do this well.



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[ October 02, 2005, 02:49 PM: Message edited by: rawvie ]
 
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