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akashverma
- 34
- 0
Can it be possible that an electromagnet would repel a iron block?? if yes then please explain.
according to me the iron block will be magnetized by the field of electromagnet in such a way that it will attract it and if there is no external field then how will it be possible that an electromagnet repels an iron block??Integral said:Only if the iron block is magnetized.
akashverma said:according to me the iron block will be magnetized by the field of electromagnet in such a way that it will attract it and if there is no external field then how will it be possible that an electromagnet repels an iron block??
I saw a video on youtube where electromagnet repels an iron block without any external field.
Got the point.. thank you man and this setup is one of the tremendous setup i have ever watched.OmCheeto said:If you notice, the electromagnet attracted the iron hammer.
The silver cylinder and slab are aluminum, as stated in the comments section by the author.
The author's explanation:
http://www.youtube.com/profile_redirector/103932266793618344395
21 hours ago
Why can it also push of metal things? And on what does it depend if it pull in or push of?
http://www.youtube.com/profile_redirector/111021059413939523708[the author]
20 hours ago
With ferromagnetic metals, always attractive (pull).
With other conductive metals (copper, aluminum) push, because of eddy currents.
The electromagnet generates a magnetic field. That magnetic field induces a current on the metals that are near. If the metal is open that currents only will flow in small local circles, but if you close the ring the current will flow around the hole ring. That current will generate a magnetic field, because moving charges generate magnetic fields (Oersted, Ampere) and that magnetic field opposes to the former one, the one from the electromagnet (Lenz's Law). This is why the ring is repelled.
Other facts from the comments section:
This is a transformer from a microwave oven.
The author powered the coil with 240 vac.
Interesting demonstration. I've only ever seen static magnets used to demonstrate this effect.
The author, according to their twitter account, is from Zaragoza, Spain.
"DIY, science, technology, experiments, physics, chemistry, ETC"
I like that guy. Someone should invite him to PF. :)
Repulsion by an electromagnet is a phenomenon in which two objects with opposite magnetic poles will push away from each other when in close proximity. This is caused by the magnetic field created by the electromagnet.
An electromagnet creates repulsion by using an electrical current to generate a magnetic field. The strength and direction of the magnetic field can be controlled by adjusting the amount of current flowing through the electromagnet. When two objects with opposite poles are brought close to the electromagnet, the magnetic fields will interact and cause repulsion.
Repulsion by an electromagnet has many practical applications, such as magnetic levitation trains, magnetic bearings for rotating machinery, and magnetic separators for separating metals in recycling processes. It is also commonly used in scientific experiments and demonstrations to showcase the properties of magnets.
Yes, the strength of repulsion in an electromagnet can be adjusted by changing the amount of current flowing through it. Increasing the current will increase the strength of the magnetic field and therefore increase the repulsion between objects with opposite poles.
Yes, there are some safety concerns when working with repulsion by an electromagnet. The strength of the magnetic field can be strong enough to cause injury or damage to electronic devices. It is important to handle electromagnets with caution and follow proper safety protocols when using them.