All right, welcome to Al's electronic classroom electronic basics Part Four. This is the final lecture in this electronic basics series. And in the next slide, I'm going to give you a problem. Let's see if you can solve it. Okay, here's a circuit problem. I have a lamp resistance of 10 ohms and a battery voltage of 20 volts DC.

I want you to find I. The other thing I want to just point out is, as far as current flow, I am using a electron flow right here, where we go from the negative polarity of the battery to the positive terminal of the battery. So let's, let's see if you can answer this again. If you need to. refer back to your notes. hit the pause button.

Okay, next question. I want you to find the lamp resistance ma again my battery voltage is 20 volts DC. My current flow is five amps. So please find the lamp resistance. Okay, here's the answer to the first question. All right, we're going to use E divided by r equals I.

Because we know the battery voltage. We know the resistance of the lamp and with ohms law if I No to I can always get the third one. So what did we What did I ask you to find? I asked you to find i. So 20 volts divided by 10 ohms equals two amps. So we know that there's two amps of current that flows and this circuit as I show you over here.

Okay and this this example we were asked to find the lamp resistance the battery voltage is still 20 volts. My current is five amps. I use this equation here he divided by i equals R. So 20 volts DC divided by five amps equals four ohms. So my lamp resistances four ohms okay what what did I cover in this course well, brief history of electronics some of the earlier pioneers, Marconi, Fleming, deforest and others. We also talked about what is a conductor and what is an insulator. We talked about current flow, meeting up both of whole flow and electron flow, current flow, we introduced voltage and we introduced resistance.

We did some basic circuit calculations if you have any questions please give Call there is my phone number 78120 to 4396. If I don't pick up, leave a message. All right, I will call you back if you're in the continental United States All right. Okay, leave a message. I will not respond to block numbers and I will try to limit the conversation to 15 minutes. I may ask you to continue using email but I do want to answer your questions.

I want to help you out as much as I can to get you to understand the material that I present also. I will be putting some more problems up some some more basic circuit problems up as we go along. And that's it. So my next course is going to get into voltage, current and resistance. We're going to explore those concepts in deeper detail. And I hope to see you there.

Again, all my courses will have a phone number and a way to contact me and I will support you in every way that I possibly can to get you to understand the material. So with that, I am going to say thank you very much for spending the time with me. And we'll see you the next time around. You have a great, great holiday. Take care