0:00
Okay, now let's say we wanted to measure our resistance in the circuit
0:06
And let's say that we didn't know what the resistance value of this resistor was
0:12
and we wanted to know what the resistance is of this resistor in our circuit
0:19
In order to do that, I need to shut this circuit off
0:24
and I need to remove the resistor from the circuit in order to measure its resistors
0:29
to measure its resistance. So I'm going to take the resistor out of the circuit, and I'm going to place it just somewhere
0:38
wherever it doesn't matter, into the breadboard over here off to the side, just so I can have
0:49
it held in place. I don't have to hold it with my hand
0:54
So I'm going to measure this resistance, so I need to set my... my multimeter to oms Now since I pretending that I don know what the resistance value of this resistor is I just going to start at the highest value of the resistance setting on my multimeter which happens to be two mega
1:22
It's totally unnecessary to do that. But if you really had no idea what the resistance value is, you could start and take kind of a methodical process
1:36
and just start at the highest value if you'd like to. You could start at 200K or even 20K if you'd like
1:42
But just to go through the process, I'm going to go all the way to the highest setting
1:46
for the oms setting of my multimeter. So I'm going to go ahead and turn it all the way over
1:53
to 2 mega-oams on my ome setting on my multimeter. And I want to take my black probe
2:03
and hook it to one side of the resistor. and I'm going to take my red probe and hook it to the other side of the resistor
2:09
It doesn't matter which way I hook up the probes of the multimeter
2:15
So right now I getting a reading of zero Now this is obviously because I set my meter too high but if we had no idea we wouldn know whether or not our reading is correct or not
2:37
So what I'm going to do is go down to the next value, and now I'm starting to get a reading here of 9
2:44
and I'm set at 200,000 oms or 200k oms. I'm going to go down to the next setting of my multimeter
2:58
and now I'm at the 20K setting or the 20,000 ome setting
3:02
and I'm now getting a reading of 0.96. So I'm going to set it to the next setting
3:12
and I'm getting a reading of a reading. of 0.973. So this is telling me that my resistance value is 973 oms or 974 oms
3:30
So if I were to look up the color code chart of this resistor it a brown black red color striping on this resistor
3:41
If I were to look up on a color code chart for resistors, I would find out that brown, black, red is a value of 1,000 oms, which is about what I'm reading here on my multimeter is about 1,000 oms
3:58
Now you're not going to always get the exact value that you're measuring on a resistor that it says on a color code chart
4:09
It's going to be around the value of that resistor value. It won't ever or always be on the exact value that the chart or the color coding chart tells you what the color coding is for that resistor value
4:28
So in this case, we get about a thousand oms. Our color code chart tells us that the brown, black, red stripes on this resistor is a thousand oms
4:40
So this tells us that this resistor is okay and it's about at the value that it should be
