Conservation of energy loopholes?

Question

So energy cannot be created or destroyed but if a satellite with a metal wires orbits around the earth with its electrical field a very large amount of energy is created while it is not getting transfered from anything. The satellite does not slow down or have any complications beside gaining electricity.
Please try to answer this because is sincerely beleive it breaks the law of conservation of energy

so i thought i would add some more details it works like an electric engine but the process reversed so instead of an engine you get a generator from moving a wire in an electrical field. so the satellite is the wire and the earth supplies the electrical field. NASA has used this method and they say it creates a large amount of energy and plan to switch over new satellites to to this method instead of solar panels.
thanks

sorry for saying electrical field i meant magnetic field.

Answer 1

No, no energy is created. The total energy of the satellite is E = K + P + W + e; where K is the kinetic energy (1/2 mv^2), P is the potential energy (mgH), e is the electrical energy (volts times current), and W is the work (mavt) to convert K and P into e, where a is tangential acceleration, v is tangential velocity, and t is time of travel.

Work is done by the satellite as it crosses the magnetic lines of flux and creates a current. In other words, the satellite is working like a generator and, through work, that converts its kinetic energy into electrical energy. So W saps K and converts it into electrical energy (e). But the electrical energy is not created, it is simply energy that was already in the system, but in another form.

As more and more W is done by the satellite to convert K into e, both K and P have to decrease to keep the total energy of the satellite constant. This follows because, v, the tangential velocity will slow as K is sapped, which then allows H the orbital height to diminish as the centrifugal force (mv^2/H) lessens. The lower H means P is lower as well.

Bottom line, the electrical energy you think is created...isn't. It's just converted kinetic and potential energy that were converted by the work caused by the wires crossing the Earth's magnetic field due to the satellite's tangential velocity v.

Answer 2

The Earth does not have an electric field, as seen from space.

It has a net electrical charge of zero. The clouds may have a negative charge, while the ground may have a positive charge, but from outer space, the effects cancel out, and the net electric field is effectively zero.

However, the Earth does have a magnetic field, so maybe that's what you were thinking of. If our satellite had a loop of wire, it could extract energy from the changing magnetic flux through the loop (generating an electric current in the loop, according to Ampere's law). However, this would necessarily cause a force on the loop of wire, and therefore a force on the spacecraft. The spacecraft would slow down, gaining electrical energy, but losing kinetic energy.

There is no free energy, ever.

Answer 3

Ahh, but the mechanism providing this electrical energy is the interaction between the Earth's magnetic field and the free charges in the conduction wire. So the earth's magnetic field actually weakens in the area near the wires. However, the energy you get out of this process is actually very small, and almost nothing compared to the energy stored in the magnetic field.

To be absolutely technically correct, the magnetic field induces a potential difference across the wire, which sets the charges in motion. The moving charges in turn create a field which superimposes with the earth's field to weaken it. Ultimately, the energy is lost somewhere in the Earth's core. Again, the amount of energy we're talking about going into the wire is like the proverbial "drop in the ocean", only it's more like a single molecule vs the ocean!

Answer 4

the drag coefficient creates the energy (motion and weight) the inertia collateral is transffered to the cable extensions which in turn create drag energy which is turned into electromagnetism, simple

Answer 5

hey,i am really interested in your question but i am not understanding the situation completely that you have described ,if you can post this question with some more elabrate way i will be trying to understand it.please.i am online for next 10 minutes.