Could you put a 25000 mile long loop of wire into orbit around the earth?

Would the earth's magnetic field induce an electrical current to flow? How much power would be generated?

Could you put a 25000 mile long loop of wire into orbit around the earth?
Previous responses are correct. To achieve an orbit at 100 mile altitude would require a wire 25,628 miles long. If the wire were rotating in its own plane, over the equator, a voltage would be induced; the average field is about half a gauss (a tesla is 10,000 gauss).
Reply:Although the field strength is small, that's a LOT of wire, and with any significant motion, considerable power could be generated -- at the expense of the wire's rotation. Report It

Reply:A 25,000 mile loop wouldn't really be in orbit, it would barely be above the ground (about 30m or something). No current would be induced unless the loop was moving through the magnetic field, in which case use Faraday's Law to work out how much.
Reply:No, because 25,000 miles is roughly the circumference of the earth. To put it in orbit at an altitude of a hundred or so miles up would require a significantly longer wire.





As for electrical induction in the wire, I imagine it would have some effect, though the wire may need to be rotating perpendicular to the poles to induce the current. Interesting thought experiment...
Reply:even if you made the loop large enough, gravity would soon pull it out of orbit. the velocity that keeps so many satellites up there no longer makes sense when the object is tied to another on the opposite side. any small variation would multiply and crash the loop. because gravity increases at inverse


square of distance



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