Generate Electricity with Earth's Magnetic Field?

In summary, the conversation discusses the possibility of using the Earth's magnetic field to generate electricity by linking large coils together in orbit. However, this idea is not feasible due to the Earth's weak magnetic field and the large amount of energy required to launch the coils into orbit. The Tether experiment performed by NASA is mentioned as an example of this concept, but it was not successful in generating enough energy. The conversation also mentions the potential for extracting electricity from the Earth's magnetic field through methods such as rotating pick up coils, but this would result in the satellite eventually crashing due to the opposing forces. The conversation also mentions Nikola Tesla's experiments in tapping into the Earth's energy, but it is unclear if this is a viable solution. Overall,
  • #1
Emicro
30
0
Would it be theoretically possible to use the Earth's magnetic field to generate electricity? Essentially, my idea is that if we link large enough coils together in orbit (not geosynchronous) we would have enough energy to run the world many times over and not have to use any fossil fuels whatsoever. How would we be able to transmit that amount of energy to the surface of the earth?
 
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  • #2
Read up on the Tether experiment performed by NASA. But its for the purpose of powering space stations an not "run the world". There simply wasnt enough energy.
 
  • #3
The Earth's magnetic field is, in fact, extremely weak. The amount of metal you'd have to put in orbit to induce any significant amount of current would be unfathomable. We'd use more energy as fuel getting all that wire into orbit than it would ever recoup.

- Warren
 
  • #4
To extract electricity from a static magnetic field the pick up coil would have to cross the magnetic lines by moving or rotating. However, eddy currents in the pick up coil would oppose the static magnetic field and exert a force and torque on the pick up coil. As the force or torque is exerted, the pick up coil would keep slowing down in motion. So the satellite orbiting the planet with large pick up coils would slow down and eventually crash. But the amount of electrical energy extracted is far less than the energy it took to launch the satellite into space. So you are back to square one.
 
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  • #5
ranger said:
Read up on the Tether experiment performed by NASA. But its for the purpose of powering space stations an not "run the world". There simply wasnt enough energy.

There is plenty of energy, the Earth has vast supplies of it. What do you think the power of a lightning bolt represents? The Earth is magnetic, has a north pole and a soulth pole and is essentially like a gigantic electric generator spinning in space. The power is there, all we need to to is discover how to tap into it. Nikola Tesla did it in Colorado. We can do it too.
 

1. How does generating electricity with Earth's magnetic field work?

Generating electricity with Earth's magnetic field involves using a device called a generator, which converts mechanical energy from the movement of magnets and wires into electrical energy. The Earth's magnetic field is used to induce a current in the wires, which is then harnessed as electricity.

2. Can this method of generating electricity be used on a large scale?

Yes, generating electricity with Earth's magnetic field can be used on a large scale. In fact, some countries, such as Australia and Israel, are already using large-scale magnetic generators to supplement their energy needs. However, it is still in the early stages of development and may not be as efficient as other methods of generating electricity.

3. Is this method of generating electricity renewable?

Yes, generating electricity with Earth's magnetic field is a renewable method of generating electricity. The Earth's magnetic field is a constant force that does not require any fuel or resources to continue producing electricity. As long as the generator is maintained and the Earth's magnetic field remains intact, this method can be used indefinitely.

4. What are the potential benefits of generating electricity with Earth's magnetic field?

One potential benefit of generating electricity with Earth's magnetic field is that it is a clean and renewable source of energy. It does not produce any harmful emissions or pollutants, making it an environmentally friendly option. Additionally, it can be used in remote or off-grid areas, providing electricity to communities that may not have access to traditional power sources.

5. Are there any disadvantages to generating electricity with Earth's magnetic field?

One potential disadvantage of generating electricity with Earth's magnetic field is that it is not yet as efficient as other methods of generating electricity. The technology is still in the early stages and may require further development to become a more viable option. Additionally, the initial cost of setting up a magnetic generator may be expensive. However, as technology advances, these issues may be addressed.

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