Motion Generator

[rlortie]

Ken,

Any metal even copper when cooled in liquid helium or nitrogen will show the same effect. You do not need any special alloys. Dip a loop of wire with a potential attached and then remove the potential and the wire will show a continuous cycling current until it is removed from the coolant.

It would take a little time for me to find it but I have a book that explains how and when this was discovered around the turn of the 19th century. Don't quote me on the date. :-)

Ralph

[Wheeler]

Do you have an idea why the magnet rolled slowly across the aluminum?


Is there a test or proof of the eddy current actions with the magnet and pipe?

Also can we cause an interference to the eddy currents and cause the action to alter?

Also as you increase the size of the ID, it will soon fall faster, so I wonder where do the eddy currents brake down.
The distance away from the magnet will brake or make the eddy current.
What happens if the pipe is 2 inch ID and the magnet is very strong?

Can the same process happen in a square pipe and magnet?

[Jonathan]

Ken, Meissner effect 1, Meissner effect 2.
Wheeler, it rolled slowly across the aluminum because of eddy currents. This can be proven by attaching the magnet to a fast motor, while getting the aluminum as close as possible, and while measuring the temperature of the aluminum. It will heat up due to eddy currents, and the motor will requrire more energy to run at a given speed as compared to when the aluminum is absent. The eddy currents never brake down, moving a magnet here in theory causes aluminum at your house to heat up a little. But for a given magnetic strength, the effects are so weak and much distance that they are easily ignored. The same process happens if a magnet moves and there is conductive material anywhere in the universe, regardless if that material is a square pipe or a plane.

[Wheeler]

If heat is caused by friction, is friction caused by the eddys?
Is something rubbing something?

[Wheeler]

This can be proven by attaching the magnet to a fast motor, while getting the aluminum as close as possible, and while measuring the temperature of the aluminum. It will heat up due to eddy currents

Are you sure this proves eddy currents?

I think it proves that resistance is present.

[Jonathan]

Friction is not caused by eddy currents.
The charge carriers of eddy currents are caused to move by the movement of the electrons in the magnet. When the charge carriers move, they "hit" nearby particles, this makes them slow down and they must be reaccelerated by the magnet. The energy lost by the charge carriers increases the random motion of other particles, which is increasing the temperature of the coductive material.
It does prove that resistance is present. But resistance doesn't cause heat, current passing through a resistance does. The hot conductive material means that there is resistance and current.

[rlortie]

For those that are into magnets, check out this link.

http://www.engconcepts.net/List_Of_Neod ... agnets.asp

Ralph

[AgingYoung]

The energy lost by the charge carriers increases the random motion of other particles, which is increasing the temperature of the coductive material.

sounds like an induction furnace.

Gene

[Wheeler]

Resistance to flow causes heat.
Resistance alone without flow causes no heat.

[rlortie]

????? Resistance to flow causes heat, OK I will buy that.

Resistance alone without flow causes no heat.

Now without flow or measurable relative motion how do you measure or define a non-existent resistance???

The only example I can think of would be the sun shining on a mass heating it up by not allowing the suns rays to penetrate. But even then you have a flow.

[Wheeler]

Simple
Stretch a large rubber band across your shop door.
Walk up to it and push yourself against the rubber band.
Now you are halfway through the door and the rubber band is stretched to half its braking strength.

Stop and hold this position.
No movement by you or the rubber band.

The rubber band has resistance, but no flow exits. No heat will be created until you begin to move again.

If you continue to push the rubber band until it brakes, more heat will be released when it implodes around you.
POW! You just crossed the threshold of physics.

[John Collins]

The rubber band has resistance, but no flow exits. No heat will be created until you begin to move again.

Are you sure about that? I'd have thought that holding the door open with your muscles, for instance, is burning energy and creating heat.

PS - isn't it the same as holding an object up against the force of gravity?

John C.

[Michael]

Energy is only used when there is motion. Statistically there is no energy spent holding an object static, even against a force, but it could be argued that there is still expansion and compression occuring at smaller levels, so some small amount of heat transfere. Still the main argument is valid.

[rlortie]

The half stretched motionless rubber band does not have resistance, it has restraint and yes, it does not produce heat. Restraint is not the same as resistance and is released when band breaks. Restraint on a motionless mass does not exhibit resistance or heat. Resistance is is only found while in motion.

There is no heat produced during the imploding as there is no resistance, (other than air) You are simply releasing the resistance acquired to build the restraint. One may say that the imploding is a negative resistance returning the work applied and equalizing the spent energy with exception to that amount lost as heat.

Sounds like a good argumentive statement for Tom Beardon and his 0 point energy theory.

If your explanation held water I could stretch rubber bands through out my house and turn off my furnace. I know of no way to produce or hold resistance with out relative motion.

Kens current design will be in big trouble if his tapered shafts produced the same amount of resistance in returning as developed when bending.

Ralph

[Jonathan]

How about this:
Resistance to flow causes heat.
Resistance alone without flow causes no heat.
Resistance alone without flow technically is not, but rather is the potential for resistance.