Now we have better ideas about howĮlectricity works, we tend to talk about current as a flow of electrons, from negative to positive, in the opposite direction to the conventional current. We call this idea conventional currentĪnd still use it to this day in things like Fleming's Left-Hand Rule. The mystery of electricity back in the 18th century, believed it was a flow of positive charges, People like Benjamin Franklin, who helped figure out That just happens to be a historical convention. If you're confused by me saying that the current flows from positive to negative, Negative terminal of the battery), and the Firstįlows from the North to the South pole of Hold out the thumb, first finger, and second finger of your left Handy mnemonic (memory aid) called Fleming's Left-Hand Rule (sometimes You can figure out the direction in which the wire will jump using a Magnet, and that's what causes the wire to jump. In the same way, the temporary magnetismĪround the wire attracts or repels the permanent magnetism from the You'll know that two magnets placed near one anotherĮither attract or repel. Magnet, this temporary magnetic field interacts with the permanent Just like magic! But there's a perfectly scientificĮlectric current starts to creep along a wire, it creates a It's amazing when you see this for the first time.
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Now if you connect the two ends of the wire to a battery, Suppose you take a length of ordinary wire, make it into a big loop,Īnd lay it between the poles of a powerful, permanent horseshoe
![electric motor winding data sheet full science fair physics electric motor winding data sheet full science fair physics](https://i.pinimg.com/originals/39/9f/b5/399fb5f850d621b2acaff8da04b4669f.png)
How does this work in practice? Exactly how doĬonvert electricity into movement? To find the answer to that, we have (metal rod) rotates at the other end giving you the power to drive a The basic idea of an electric motor is really simple: you put electricity into it at one end and an How does electromagnetism make a motor move? How an electric motor works-in practice.How does electromagnetism make a motor move?.Spinning in the same direction (as explained below). The copper-colored thing toward theįront of the axle, with slits cut into it, is the commutator that keeps the motor
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This is the motor from an old electric lawn mower.
![electric motor winding data sheet full science fair physics electric motor winding data sheet full science fair physics](https://i.ytimg.com/vi/P3WITwEnLnM/maxresdefault.jpg)
That's because they're packed with tightly wound copper and heavy magnets. Photo: Even small electric motors are surprisingly heavy. Let's pull some apart and find out how they In the kitchen, motors are in just about every appliance from clothes washing machines and dishwashers to coffee grinders, microwaves, and electric can openers.Įlectric motors have proved themselves to be among the greatest Toys in the bathroom, they're in extractor fans, and electric shavers You're sitting in a bedroom, you'll find motors in hair dryers and many In your computer for starters, one spinning your hardĭrive around and another one powering the cooling fan. Motors are there in the room with you right now? There are probably two Last updated: October 25, 2021.įlick a switch and get instant power-how our ancestors would have lovedĮlectric motors! You can find them in everything fromĬars-and you might be surprised how common they are. In the most general form, magnetic flux is defined as \Phi_.By Chris Woodford.The magnetic flux (often denoted Φ or Φ B) through a surface is the component of the magnetic field passing through that surface.It is a change in the magnetic field flux that results in an electromotive force (or voltage).