Siemens discovered through research and experiments that electricity can also be generated using electromagnets instead of permanent magnets in generators. Indeed, the iron core of the electromagnet always retains weak magnetism when no current is flowing. When the coil rotates, this small residual magnetism can be used to generate electric current. Current is returned to the electromagnet, causing its magnetic force to increase. As a result, the electromagnet can produce strong magnetism and thus emit a strong current.
A wonderful person can generate electricity using magnets and copper wires. It's not scientific. What is the principle?
This video is a scam!
Magnetic electricity must meet the following two conditions:
1. The conductor forms a closed loop.
2. The magnetic field in the closed loop changes continually. (To be precise, the magnetic flux inside the closed loop is continuously changing!)
Both are essential!
The conductor and electrical device in the video form a closed loop, which satisfies condition 1. However, because the magnet is static, the magnetic field it excites is of course constant, which obviously does not satisfy condition 2!
So we can conclude that if you only see these things, there is no way the light bulb will turn on!
So how does it look in the video? There are two possibilities:
1. There is a strong, ever-changing magnetic field under the table that you can't see (for example, there is a Tesla coil hidden under the table), that's what you see. in this video Such a situation!
2. There's a battery somewhere you can't see! (This may be the case in other similar videos.
Is it true thatAre magnets used as free energy generators in the photo?
The principle is the law of electromagnetic induction. p>
The law of electromagnetic induction is also called Faraday's law of electromagnetic induction. The phenomenon of electromagnetic induction refers to the phenomenon of electromotive force induced due to changes in magnetic flux. part of the conductor in a closed circuit moves to cut the magnetic field lines in the magnetic field, the conductor A current will be generated, and the generated current is called induced current, and the generated electromotive force (voltage) is called induced force electromotive.
The direction of the electromotive force in the law of electromagnetic induction can be determined by Lenz's law or the right hand rule: Stretch your right hand flat so that that. your thumb is perpendicular to all four fingers. The palm of your main faces the N pole of the magnetic field. The direction of the thumb is consistent with the direction of the driver's movement. the current induced in the conductor (induced electromotive force). The direction of the induced current is the same as the direction of the induced current.
Lenz's law states that the magnetic field of the induced current must interfere. the change in the original magnetic flux. In short, the magnetic flux becomes larger and the generated current has a certain effect. The magnitude of the induced electromotive force is determined by Faraday's law of electromagnetic induction e(t) = -n(dΦ); )/(dt). The situation can also be found using E=BLV
The importance of the law of electromagnetic induction: The phenomenon of electromagnetic induction is one of the most significant discoveries in electromagnetism Firstly, it reveals the interconnectionion between electric and magnetic phenomena, which is of great importance for the establishment of Maxwell's electromagnetic field theory.
The importance of Faraday's law of electromagnetic induction lies in the fact that, on the one hand, based on the principle of electromagnetic induction, people have created generators, making possible mass production and transmission of electrical energy over long distances; on the other hand, electromagnetic induction The phenomenon is widely used in electrical technology, electronic technology and electromagnetic measurement. Human society has since entered the era of electrification.
Baidu Encyclopedia - Law of Electromagnetic Induction
I can answer you responsibly, I tested it myself and that's true !
The principle of this device is the induction of radio waves (the same principle is used in chargingement wireless current). The invisible electromagnetic waves in the air cause the coil to obtain alternating current induced electromotive force through electromagnetic induction. it is not a true perpetual motion machine. In the absence of electromagnetic waves, it doesn't work as far as signals are concerned (what we call electromagnetic pollution is actually various electromagnetic waves in the air, which are also a form of energy, but it is the source of this type of static magnetic energy generation)
It's as if the mineral radio I made when I was a kid didn't have an energy supply for it. The whole electronic device, but it was still possible to listen to the radio normally. One of the key components was the magnetic rod wrapped with a coil.
There was also the previous transformer. When disassembled, there are two physically isolated coils. One of the bobines is connected to alternating current and the other. another coil generates different alternating voltages depending on the different number of turns. It is also based on the principle of electromagnetic induction.
This type of static electromagnetic power generation device If placed in a sealed large iron box, it will fail, because in this case, the external clutter will be protected. If there are no external induced waves, what we often call electromagnetic pollution, to provide the initial energy, the static magnetic coil will not generate energy either. electricity
The little coil in the video looks a little unreliable, but the principle is still correct. If you want to get better results you need more rounds and larger volume, I directly took apart a waste ceiling. fan and successfully experimented with the big coil inside
You can try itr yourself, or find materials from used motors and used fans ready to go. There is trash in our community. Shopping stations, look for these things. which are very cheap