Electricity from the Earth's magnetic field via electromagnetic induction
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- čas přidán 8. 09. 2024
- This experiment generates an electric current from the magnetic field that surrounds the Earth by means of electromagnetic induction. A solenoid with approximately 200 copper wire windings is rotated by a drill machine. Due to its rotation in the Earth’s magnetic field, the magnetic flux changes and thus a current is inducted into the solenoid. It is measured with two slide carbon brushes and displayed on the multimeter.
Addressing some of the comments: The "law of conservation of energy" holds. Here, electricity is converted to the mechanic rotation of the solenoid, which is in turn converted back to electricity. In a similar way, we could rotate the solenoid by hand. Energy is neither "created" or "destroyed", it is transformed from one form to another, in a closed system.
This is an experiment from the first-semester lecture "Electricity and Magnetism" given by Christian Bettstetter in the bachelor program "Informationstechnik" at the University of Klagenfurt, Austria.
Link to the lecture: bettstetter.co...
Video made by Judith Wieser.
Text by Judith Wieser and Christian Bettstetter.
(c) 2021 Universität Klagenfurt
Disclaimer: Do not repeat at home.
This good example, thanks
Would be interesting to see this experiment conducted at different locations and different altitudes, including at low and high orbits.
Yes
What if u add more wheels making a sphere I wonder what the output would be like
Great example I believe...
It is better mining energy from volcano.
Was it uA or mA?
nice
And so, who provides the power for that drill??? 😅😂
Electricity is converted to the mechanic rotation of the solenoid, which is in turn converted back to electricity. Energy is neither "created" or "destroyed", it is transformed from one form to another.
@@bettstetter Your theory about conversion of energy, from one form to the other etc etc, is old stuff, taught in 'normal' engineering colleges. What you don't know is that this understanding is applicable ONLY to a 'Closed' system. It does not apply to an 'Open' system, as per Nikola Tesla. And.......all this has nothing to do with my primary question. I'm trying to point out that this experiment does not exhibit any useful phenomenon. We all know that the earth's magnetic field can be used in place of a local magnet, to generate a small amount of power in a rotating coil. If that coil is rotating from the energy, so generated, then it is something very very interesting. What you are showing is for school kids. Sorry. 😂🤣😅
"What you are showing is for school kids. Sorry. 😂🤣😅". I don't see anything wrong with teaching school kids (or, in this case, first-semester bachelor students) the well-known principle of electromagnetic induction.
@@bettstetter Thanks, Professor!! 🙏🙏
So can we make cogg free generator with this?
the boat turns ok. can fins then propel it forward. quite a disproof.
use crygenic temperatures to make a magnetic helicopter? i will look on youtube. the point is missed.
Then why we are using magnet inside a generator
Earth's magnetic field is very weak
make a magnetic helicopter? probably not. the current has to be about 10,000 amps through a small wire. it will deflect. i put turns on a bike hub.
Let’s address the elephant in the room, what acts on earth as a power tool making us spin in an exact distance to the sun in a stable plane around the sun?
It’s electromagnetism of cause, more exact Birkeland currents from the sun and cosmos
-Strong current=Earthquake’s and volcanic activity=Global warming
-Low current=Iceages
when you get energy out without putting anything in give me a call.
And...what if I say, I have it? A motor generator that can charge LA batteries with the energy extracted from the local environment.
so have i from the air but that energy exists all day everyday you still getting it from the air it is free as you dont pay for it but your still putting in to get something out.@@tonyrebeiro
How many volt? İt's unreadable
At the measurements in this video we could reach up to 16mV.
@@physics-em what if we made the loop 300 times bigger and denser, would that increase the voltage
Magnets are hidden below🤔
The meter is too small to read the units. milliamperes? What is the rotation rate in Hertz? What can you conclude about the magnetic field of the earth at that location? How much loss from sliding contacts? How much energy used by the drill? How much energy lost to air resistance? No equations, no records or analysis of data, no numbers or units, no charts, no science? And what is "do not repeat at home"? A joke? I know you can do better. Much better. It has 438 views today. If you gave a real lecture to that many people, you would prepare more and try harder wouldn't you? If you put in the effort, people will recognize your care and effort and more will watch.
ههههههه
هذب بسبب الاحتكاك مع الفحم
Here's something you didn't take into factor. The magnetic field acts in lines and you did not perform that test over were the earths magnetic field comes out of the earth it was at a random classroom.this needs to be done at a magnetically anomalous location
Correct. The concept is correct but the demonstration is not accurately reflective
No the earth's magnetic field is a field, that is at every point in space there is some value of magnetic potential, we can take the derivative of the magnetic potential field to describe a tangent space that is the direction in which the magnetic field changes across space. You have a big misconception. Lines are used to visually describe the slope of magnetic potential throughout space, which is pretty much uniform across the surface of earth, from north to south.
Still, waste of time and effort. Nothing useful.😅😂
@@tonyrebeiro I think it is maybe a unique example of how moving electrical bodies in magnetic fields causing electromagnetic flux, this video should not be taken as a source of power, but instead educational about electrodynamics, and wanted to point out a misconception in this comment section about how electrodynamics works at least classically, I'd highly suggest Griffiths to anyone who reads this and of potentials, flux, and moving bodies.
@@blind377 Yes. Good for school and college students. Not for me. 😅🤣😂
🤣🤣🤣🤣🤣👎
Wtf
You need energy to drive any drill machine. So energy remain same.
Sure! The law of conservation of energy holds. Here, electricity is converted to the mechanic rotation of the solenoid, which is in turn converted back to electricity. Energy is neither "created" or "destroyed", it is transformed from one form to another.
But you forgot to mention how much energy is going in vs how much you are getting out. 😅😅😂😂