Electromagnets: Understanding the Basics

Hello everyone and welcome to this week's video today I'm going to be explaining electromagnets uh and how they work electromagnets are important for understanding uh a better understanding of motors and so first I'm going to explain how these work and then we can get into more complicated Motors so an electromagnet is basically um just a magnet that is created by using a current so if you haven't watched my video on magnets you may want to check that out first and I'll include a link in the description now

The Electromagnet: How It Works

The electromagnetic the magnetic field is created and it's all based on the right- hand current rule so this says that if you point your dire your thumb in the direction of current flow um on a wire as we've drawn here your fingers will show you the direction of the magnetic field so you can see the magnetic field is rotating around the wire as you pass a current through it so what we've got here is a battery connected to a coil wire and this coiled wire uh spinning around so kind of going if you can just follow with me back into the board and then coming out so you've got this the flow from positive to negative of the current uh passing through this and so this creates these magnetic fields around this wire okay

The Flow of Current

So as we look at each part of this circuit it's kind of the easiest way to visualize is look at the ends of this so up at the top here you've got your wire going into the board so your current is going to be flowing like so now over here you've got the same thing happening so you've got your current flowing or your magnetic field in that direction okay so on the bottom end since you're going to be coming this direction you're going to have your magnetic field rotating around in this direction so as you you can see you're kind of lining this up and so what this does is you're creating a larger magnetic field and so it's all going to come and kind of follow these smaller magnetic fields so the entire inside um if you can imagine of this wied coil is going to have all these arrows pointed uh in the opposite direction so the magnetic field is going to travel through here to the North Pole which is going to be on this side and then pass around the outside of the magnetic coil and come to the South Pole

Creating a Permanent Magnet

A basic overview of what this looks like is you're going to have this uh item in the center this axle that you're going to ro wrap the wire around and so when you wrap that wire around it you're basically creating uh a permanent magnet now it's not a permanent magnet because it requires a current to create it but it basically does essentially the same thing so you've got the North and South Pole just like in a permanent magnet you have your North and South Pole

Increasing the Strength of the Magnet

Now you can increase the current or increase the number of wire coils the number of times you rotate that wire around and you can increase the strength of that magnet so hopefully that gives you a better understanding of how electromagnetics work feel free to leave any questions or comments below

"WEBVTTKind: captionsLanguage: enhello everyone and welcome to this week's video today I'm going to be explaining electromagnets uh and how they work electromagnets are important for understanding uh a better understanding of motors and so first I'm going to explain how these work and then we can get into more complicated Motors so an electromagnet is basically um just a magnet that is created by using a current so if you haven't watched my video on magnets you may want to check that out first and I'll include a link in the description now the electromagnet the magnetic field is created and it's all based on the right- hand current rule so this says that if you point your dire your thumb in the direction of current flow um on a wire as we've drawn here your fingers will show you the direction of the magnetic field so you can see the magnetic field is rotating around the wire as you pass a current through it so what we've got here is a battery connected to a coil wire and this coiled wire uh spinning around so kind of going if you can just follow with me back into the board and then coming out so you've got this the flow from positive to negative of the current uh passing through this and so this creates these magnetic fields around this wire okay so you can see that if you've got your current going in this direction your magnetic field is going to wrap around then as it goes down it's going to wrap around the other direction and then as it comes back up it's going to continue to wrap around in that direction okay so if you look at each of these it's kind of the easiest way to visualize is look at the ends of this so up at the top here you've got your wire going into the board so your current is going to be flowing like so now over here you've got the same thing happening so you've got your current flowing or your magnetic field in that direction okay so on the bottom end since you're going to be coming this direction you're going to have your magnetic field rotating around in this direction so as you you can see you're kind of lining this up and so what this does is you're creating a larger magnetic field and so it's all going to come and kind of follow these smaller magnetic fields so the entire inside um if you can imagine of this wied coil is going to have all these arrows pointed uh in the opposite direction so the magnetic field is going to travel through here to the North Pole which is going to be on this side and then pass around the outside of the magnetic coil and come to the South Pole so a basic overview of what this looks like is you're going to have this uh item in the center this axle that you're going to ro wrap the wire around and so when you wrap that wire around it you're basically creating uh a permanent magnet now it's not a permanent magnet because it requires a current to create it but it basically does essentially the same thing so you've got the North and South Pole just like in a permanent magnet you have your North and South Pole now you can increase the current or increase the number of wire coils the number of times you rotate that wire around and you can increase the strength of that magnet so hopefully that gives you a better understanding of how electromagnetics work feel free to leave any questions or comments belowhello everyone and welcome to this week's video today I'm going to be explaining electromagnets uh and how they work electromagnets are important for understanding uh a better understanding of motors and so first I'm going to explain how these work and then we can get into more complicated Motors so an electromagnet is basically um just a magnet that is created by using a current so if you haven't watched my video on magnets you may want to check that out first and I'll include a link in the description now the electromagnet the magnetic field is created and it's all based on the right- hand current rule so this says that if you point your dire your thumb in the direction of current flow um on a wire as we've drawn here your fingers will show you the direction of the magnetic field so you can see the magnetic field is rotating around the wire as you pass a current through it so what we've got here is a battery connected to a coil wire and this coiled wire uh spinning around so kind of going if you can just follow with me back into the board and then coming out so you've got this the flow from positive to negative of the current uh passing through this and so this creates these magnetic fields around this wire okay so you can see that if you've got your current going in this direction your magnetic field is going to wrap around then as it goes down it's going to wrap around the other direction and then as it comes back up it's going to continue to wrap around in that direction okay so if you look at each of these it's kind of the easiest way to visualize is look at the ends of this so up at the top here you've got your wire going into the board so your current is going to be flowing like so now over here you've got the same thing happening so you've got your current flowing or your magnetic field in that direction okay so on the bottom end since you're going to be coming this direction you're going to have your magnetic field rotating around in this direction so as you you can see you're kind of lining this up and so what this does is you're creating a larger magnetic field and so it's all going to come and kind of follow these smaller magnetic fields so the entire inside um if you can imagine of this wied coil is going to have all these arrows pointed uh in the opposite direction so the magnetic field is going to travel through here to the North Pole which is going to be on this side and then pass around the outside of the magnetic coil and come to the South Pole so a basic overview of what this looks like is you're going to have this uh item in the center this axle that you're going to ro wrap the wire around and so when you wrap that wire around it you're basically creating uh a permanent magnet now it's not a permanent magnet because it requires a current to create it but it basically does essentially the same thing so you've got the North and South Pole just like in a permanent magnet you have your North and South Pole now you can increase the current or increase the number of wire coils the number of times you rotate that wire around and you can increase the strength of that magnet so hopefully that gives you a better understanding of how electromagnetics work feel free to leave any questions or comments below\n"