 So hey guys in this video. I'm going to introduce to you two new words They are voltage and current a lot of people have misunderstandings about what these words mean So to help me explain it clearly. I've invited my friend Sam along So Sam need him here. He is an excited particle at Cuesta con a science performer And he also graduated with honors in physics here at the ANU so he knows what he's talking about so Sam tell us about current and voltage Well look when I've actually brought something along to help with this explanation today I have here a bucket of Coulombs now, I believe you guys have met columns before they are the standard electric charge units and it turns out Coulombs are pink and fluffy. So can you learn something new every day? Right now? I'm going to sit over here with my bucket of fluffy coulombs being like a big battery or a power station or something like that Paul Lachlan over there has no electricity Electricity so I'm going to share some of these coulombs with I'm going to give them to him so that he can use electricity And maybe turn on the television or record more of these videos for you guys now to do that I'm going to throw them over towards him, but there are a bunch of different ways I can actually throw these coulombs to lock them So the first thing I'm going to do is just try throwing them harder and softer now How hard I actually throw these coulombs is described by something called the voltage Now voltage is measured in units of volts and one volt is one joule per coulomb Okay, so I throw this nice and soft like this. This might be one volt Did I make it to you a lot? No, so that was one joule per coulomb switch coulomb that I threw Well the one coulomb that I threw only had one joule of energy Now in a real electric circuit the chargers Aren't really moving faster or slower like these balls out when I throw them through the air But they are moving with more or less energy. So this is two volts Hey, it made it to you, but I can throw them even higher. This is like five volts That's five volts and it locked on right in the face. Could you feel like was it carrying more energy Lachlan? There was definitely more. There was definitely more energy. Okay now There's another thing I could change as well. You see if Lachlan is sitting over there and I throw him one coulomb and Then keep all the rest for myself That's not very useful for poor old Lachlan. So now what I'm going to try to mean is throwing him a Constant stream of coulombs and that is called an electric current Now current has units of amps, which is one coulomb per second. So here we are I'm going to throw one coulomb per second one One. Oh, no, that was two. That was two. Here's one one One one. Now I can increase that I can throw two per second like this And if I had the hand I coordination I could throw three per second, but I don't so we're not gonna We're just gonna leave that up to your imagination. Now. There's actually a third word that we can introduce now to You see when you combine voltage and amperage when you throw One coulomb per second with one volt worth of push. You actually get something called a watt Now one watt is a measure of power. It's one joule per second And so you actually multiply the volts by the amps and you get the number of watts so I can make One watch by throwing one amp with one box like this This is one per second and it's really not thrown very far now I can double the wattage by either doubling the voltage like this Or just doubling the amperage like this or I can increase both and make like 50 watts and electric heat So I hope that made things a little bit clearer for you guys I hope I gave you a picture of what's actually going on inside an electric circuit now in a real circuit You might not have a little person called Sam throwing pink fluffy balls at someone called Lachlan What you might actually have is something like the battery or another power supply like that But I had lots of fun throwing pink fluffy things at Lachlan today. I hope you guys enjoyed it, too Thank you very much. Thank you Sam for introducing us to current and voltage. You're very That's alternating currently go back and forth like that