How to Measure Components in an Electronic Circuit

Video Transcript

Hello! This is Ross on behalf of expertvillage.com. How do you measure the components? How do you talk about them? What is their scale? These are just so important to understand. We are getting to schematics later when you look at them you will need to understand them, but let us talk about right now what the units of measure are? Here are like two types of resistors, but they are measured in ohms with the omega symbol representing ohms. If capacitors are represented in farads, that’s a unit of measure and then inductors this is a transformer, this has two inductors in it, measured in henries and because of scale you are starting to getting into powers of 10 plus or minus. So really hour unit or number line if you will for measuring. We are going to start right at one here. This is zero down here if you will. We would not go below zero but we will go small then we will get bigger. As a matter of fact as we move to the right it will of bigger numbers like 10, 100, 1000. When you get to 1000 we use kilo here we can say one kilo or simply just 1K. When you get to a million we will use mega for million or just 1M and then we can move up further depending on what we are talking about. When we are coming down the opposite way we have 10’s, 100’s and 1000’s. When you get enough 1000’s here we are going refer to it as milli so you can have one milli or something. Powers of 10s start describing this as we move through it because here this is 103. This is 106 for millions. Now this is 10-3. When we get to the 10-6 we refer to that as micro and we use the symbol U for micro. Then the next level you come down will be nano, which will be 10-9 and then we get rate on down to pico and pico is 10-12. Now pico use a lot of capacitors, because you might say this capacitor’s value is 10 pico farads. So the 10-12 or 10 x 10-12 farads. Ohms you are going to get up in the ohms and you are going to start this is a 2K Ohms resistor or it is a 1 megaohm resistor. So those are you are powers and units of measure on the high side here after you get past mega and then you are going into giga, which is 109 which is a billion. And then you get into tera, which you are hearing more about in computer field, so that is going to be the 1012 and that is your units of measure.

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