Copper pipe and neodymium magnet

What people said

Cites DK2AX · 2015-02 · Physics Stack Exchange · on “Why doesn't a levitating superconductor generate usable electricity?”

You could use it in the same way that coils of copper wire are used in a generator. It is fundamentally nothing different, only that the resistance is zero. You might have seen that a magnet falls slowly, like in a viscous fluid, when link [this video] it is falling through a copper tube. So, by building a generator that uses superconducting wires instead of copper wires, you end up with a higher efficiency, which is partly offset by the power you need to cool the superconductor down to when it reaches that superconducting state.

Cites Farcher · 2016-09 · Physics Stack Exchange · on “EMF dependence on certain variables (radius, loops and velocity)”

The analysis you are attempting is much more complex because you have made some assumptions which are not realistic. The first is that the magnet produces a magnetic field which is constant. This is not true as by a simple experiment you can show the attractive power of a magnet for a piece of iron depends on the separation between the iron and the magnet. So what happens is that the magnet is released and accelerated because of the gravitational attraction due to the Earth. As the magnet gets closer to the solenoid the magnetic flux linked with the coil increases in a very non-linear way and thus an emf is induced in the solenoid. The closer the magnet is to the solenoid the faster it is go

Cites Farcher · 2017-04 · Physics Stack Exchange · on “Enhancing strength of magnet, practical question”

You may be better off to use a tube made of a non-conductor instead of brass as this will prevent eddy current being produced in the tube which would produce forces opposite the the direction of motion of the magnet? [this video]

Cites Michael Seifert · 2018-03 · Physics Stack Exchange · on “Explanation of induced E.M.F. graph when a bar magnet falls through a coil”

What kind of coil are you using? Its self-inductance may be substantial, which would affect your results. Also, back reaction from the induced current on the magnet may slow it down, as in the classic copper tube and magnet [this video] demo; it would be helpful to know what sort of current you're inducing, so that we could tell if this effect is important in this situation.

Cites LSerni · 2018-04 · Worldbuilding Stack Exchange · on “What would be the side effects of a massive, strong magnetic field?”

An attractive force of 10 Newton (1 kg) at a distance of 100 miles is something huge . A permanent magnet's force increases with the cube of the inverse of the distance, so at 50 miles you'd have 80 N, at 25 miles 640 N (enough to lift the weight of the average woman), at 20 kilometers 5120 N (half a ton). At a distance a little more than one kilometer you'd experience a pull of two thousand tons (20971.5 kN), about six times the maximum thrust of a Boeing 747's Pratt&Whitney turbofan (and a 747 has only four of those). The field intensity at that distance is two hundred times greater than a NMR machine, more than enough to have a detectable, macroscopic effect on diamagnetic substances like

Cites spaceamoeba1010 · 2022-07 · Worldbuilding Stack Exchange · on “would this Lenz law based inertial dampener work?”

Basically this "Inertial Dampening" systems works like a magnet falling though a cooper pipe [this video] But replace the falling magnet with a crew capsule surrounded by a powerful electromagnet with a magnetic field reflective material in-between. And replace the cooper pipe with a long elevator shaft which is also insulated on the outside with a magnetic field reflective material to prevent damage to outside electronics. Basically, when the ship is doing a high g burn the crew capsule will be in a very slow freefall down the long elevator shaft like a magnet through a copper pipe.

Cites imtaar · 2022-08 · Worldbuilding Stack Exchange · on “would this Lenz law based inertial dampener work?”

Big shock at the end As shown in the video [this video] , the magnet has freefall before it enters the copper pipe. the magnet falls slowly inside the pipe because of the Lenz law. the magnet has freefall again when it comes out of the copper pipe and it hits the table. The same thing will to the crew. When the capsule comes out of the copper pipe, it will hit the end of the ship, giving a big shock. Flip the pipe at proper intervals One way to overcome this is to flip the copper pipe at proper intervals so that the capsule remains inside the pipe. See 0:36 of this video [LINK] . Alternating pipes Another way is: Put capsule in pipe A. It will slide down. As it enters pipe B, Bring pipe A under i

Critical John Duffield · 2015-10 · Physics Stack Exchange · on “Can the mass of an object be changed by adding opposing magnetic fields?”

Can the mass of an object be changed by adding opposing magnetic fields? Yes. When you push two opposing magnets together you add energy. So the mass increases. It's the same when you compress a spring. Apparently it does. Or is this [LINK] voodoo physics? That's interesting. I've never seen that before. I hesitate to say it's voodoo physics because a magnet falls slowly through a copper pipe [this video] . Boyd Bushman Changed the mass of a black box object, rock. He took two black box rocks. One rock he added two magnets connected in opposition S-N-N-S bolted together. And the other rock had no magnets. He then drop them both at same time from a 40 story building and the rock with magnetic fiel