Is Magnetism Used in Engineering? Can Someone Explain This Video?

In summary, the video shows someone demonstrating a motor that runs on the principles of magnetism. The person moves a handheld magnet to affect the position of the magnet in the motor, causing it to work. However, it is possible that the motor was powered by a hidden battery, making it a hoax. It is also mentioned that it is possible to make a synchronous motor using this concept, but it would require precise control of the magnets. The commenter also suggests that the video may be trying to sell "magic carrots" as a way to manipulate the motor.
  • #1
VansenS
2
0
Can someone explain this video:



If I put this together myself should I expect it work or is that some hoax? If that's just a normal use of magnetism, then where can I read more about the principles behind it? Do these magnets get weaker over time?
 
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  • #2
From a recent comment on the video:
MagneticSyncopation said:
If you notice at 1:57,he is moving the handheld magnets.If you can understand this, how he is able to keep this working is due to the motion of his hand affecting the position of the hand-held magnet.

In other words, by moving the hand-held magnet he does work (i.e. supplies energy) on the system.

If you do build this, please post back and let us know what you find out.
 
  • #3
It looked like the motor was turning pretty fast, so maybe they stopped the filming and inserted a battery in the wiring. So it would be a hoax. Don't waste your time with it.

You could make a synchronous motor like that, but you couldn't control the magnet accurately enough with your hand.
If all the magnets in the rotor were mounted with north poles facing out then you could attract each one with a south pole and then repel it with a north pole to keep the rotor turning.
 
  • #4
If you start out with a rapidly spinning wheel and videorecord it as the dynamic brake of the light slows it to a stop while you hold a carrot nearby, then you can reverse the clip and post it on youtube and get a few people to try wiggling a magic carrot around...lol.
Sometimes the object is selling them the magic carrots to play with.
 

1. What is magnetism and how does it work?

Magnetism is a natural force that causes certain materials, such as iron and nickel, to attract or repel each other. It is caused by the alignment of electrons in atoms, which creates a magnetic field. This field can then interact with other magnetic fields to create attractive or repulsive forces.

2. How is magnetism used in engineering?

Magnetism is used in engineering in a variety of ways, such as in power generation, motors, and data storage. Magnets are also used in medical imaging, transportation systems, and many other applications. Engineers use magnetism to design and create devices that harness the power of magnetic fields for various purposes.

3. What is the difference between permanent magnets and electromagnets?

Permanent magnets are made from materials that naturally have magnetic properties, such as iron, nickel, and cobalt. They retain their magnetic field without the need for an external power source. On the other hand, electromagnets are created by passing an electric current through a wire coiled around a metal core. They only have a magnetic field when the current is flowing through them.

4. How do engineers manipulate magnetic fields?

Engineers can manipulate magnetic fields by altering the shape, size, and composition of the magnet or electromagnet. They can also control the strength and direction of the magnetic field by adjusting the electric current flowing through the wire. Additionally, engineers use techniques like magnetic shielding and magnetic levitation to control and isolate magnetic fields.

5. What are some real-world examples of magnetism and engineering working together?

There are many real-world examples of magnetism and engineering working together, such as the use of magnetic levitation trains in Japan and China, magnetic resonance imaging (MRI) machines in medical facilities, and electric motors in cars and household appliances. Magnetic sensors are also used in smartphones and other electronic devices, and magnetic storage devices are used in computers and other data storage systems.

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