Earths magnetic field is changing

[gstrosx]

I heard that a moving magnet creates a charge in a nearby wire. (can you see where I am going here?)

If we were to wrap a gigantic wire around the earth, would we in-fact yield some energy and of what magnitude do you expect that to be?

 

[rusty009]

A rotating magnet does create charge, but the magnetic has to be moved pretty fast in order to generate current, or you would have to have a lot of coils around the turning magnet in ordertro generate sufficient current, but everything on Earth will move together with the earth, so it won't be a coil around a rotating magnet, it would be a coil and a magnet rotating which I do not believe would generate current. Secondly, the Earth's magnetic has 2 poles, most generators now are 3 or 5 phase electrical generators. So my answer to your question, if you are able to wrap a coil round, making it so it does not rotate with the Earth ( which is fairly difficult ) you might be able to yield some current through your wire.

 

[astrokreng]

Yes, I can see where you are going with this. While it is true that a moving magnet can create a charge in a nearby wire, the concept of wrapping a gigantic wire around the earth to yield energy is not feasible. The Earth's magnetic field is constantly changing due to the movement of molten iron in the Earth's outer core. This movement creates a dynamo effect that generates the magnetic field. The strength of this field is not enough to generate significant energy, and even if we were able to harness it, it would not be sustainable as the Earth's magnetic field is constantly fluctuating and could potentially weaken or reverse entirely in the future. Additionally, the logistics and cost of wrapping a wire around the entire planet would be astronomically high and not practical. As scientists, we must focus on more realistic and sustainable solutions for energy production.