I've got three batteries again in series aiding, let's go through that and measure the voltage. Going to my voltage scale, make sure I'm on DC volts, take my meter leads, and we should read that 29.6 again, we know it's high because they're new cells. Okay, so now what I'm going to do is I'm going to my current scale. Okay, right here, and I've already connected up. This is my hundred K resistor. I'm in the positive lead of my first nine volt battery.

The other side of the resistor here, I'm going to connect to my red meter lead, which I'm going to do now. All right, and now I'm going to take my black meter lead and I'm just going to place it on my battery. And again, I make sure you're on DC. And there we go. All right, we're point it should ideally be about point three milliamp ers. All right, but guess what?

We've got a micro ampere scale here. So if I go up one, this is milliamp hours if I go up one, that's micro ampere hours. I can get a better reading. That's not right. Why isn't that right? Oh, cuz I gotta do that again.

There we go. fell again. Okay. So now let's go on back on there and you'll notice I've got three full digits. Okay, if I go back here and I get point two nine milliamp hours by go up here I get 292 milliamps so I get I'm sorry, micro amp hours. So I get my resolution is a little bit is a little bit better.

Okay, and that that's the point I wanted to show you here. Okay, so now let's leave it on the scale. And let's remove one battery and now I've got two and I should be a third less, which I am. Okay 196.2 micro amps because I'm on the micro amps scale. All right, and Now let's remove another battery. And now I've just got nine and that should be a third less also, and 98.3.

The reason it's a third last each time is I'm taking one third of the voltage down, my resistance stays the same, so therefore my current decreases by a third. All right, so that's pretty much it. Um, again, I'm going to put the link for the meter. The link for some resistances I'm using, let me stay here. Now I'm using eighth watt resistors he's not I'm sorry. I'm using quite a watt resistors I suggest only because some of you are looking we're going to do on the next lab.

The next follow along lab. We are going to do some resistance measurements. And I really think suggest that you get at least half watt resistance for the reason is, you'll be able to see the colors a little bit better. And that's really the only reason plus the difference in prices is very, very minimal. And it's they're easier to deal with them the quater watts. Alright, as far as, you know, lifting them up connecting leads and that type of thing and, and looking at the color codes, when I bought these, I really didn't think about that portion of it.

And quite honestly, in the labs that I work with, we for the most part, we use quite a lot resistors because we used a lot of instrumentation technology and and the current wasn't that large and the voltage was like 510 1520 volts, so we didn't need anything that big. But I think for students that are learning to color code and want to look at the colors on the resistance, I think fall for that reason. You should get at least a half one half one. All right. With that said, we're going to finish up this lab and look for the link at the end. And I'm also going to put it up at the beginning of this also.

So take a look at it. And on the next section of this lab, we're going to do some resistor. We're going to read some resistor values, which shouldn't take long and those resistors that are burnt out. We're going to measure the resistances on them and see if we damage them. Okay, with that said, this is Al we'll see you on the next lecture. Bye bye