Single Wire Tests

[hartiberlin]

Hi Kames,
where is any magnet in this setup ?
In the swing ?
Did you wind the wire around the magnet ?


Please explain in detail.
Did the swing go more out when using more current ?
Then it is probably an effect of repelling the wires which hold
the swing.
As these wires are flexible and also carry a high current the magnet in the swing ?
will repell the holding wires, so the total swing goes out to one side....
Is this  correct ?

[kames]

Hi Stefan,

Attaching high-resolution pictures. I hope it can clear up confusion.
In the drawing you can see the semantics of the assembly. It is like a swing. Don?t pay much attention to the 555 timer and resistors. That was the very first test and I didn?t record any video of it. You can use a manual switch and a different resistor. However, the result was the same. In my original video post I specified all the data, voltage, resistors?
In the picture, you can see the magnets and a sharper stick. A short thick horizontal piece of wire is suspended on relatively thin wire threads. Two vertical thick copper wires are used to supply a DC current pulse to the short horizontal piece of wire through two other vertical thin threads. Like a swing. When I turn on the current the horizontal piece of wire is repelled from the magnet farther than when it calms down, while the current is STILL flowing through the wire.
Don?t pay attention to the diodes you see. I just didn?t have anything more convenient to fix the wires on, which is why I used a circuit from another test to fix the wires on.

To answer you other questions.

>>>> Did the swing go more out when using more current ? >>>>
Yes. When the current is increased the wire is repelled farther from the magnets and the deviation is higher as well. This is nothing unusual. The difference between a point of equilibrium and a max deviation (in %) decreases with decreasing the current. Two vertical thin wire threads working as a little spring (and swing) can explain this.

>>>>> Then it is probably an effect of repelling the wires, which hold
the swing.>>>>
Not only. It is also happening in case of attraction. You can try it. When I change the direction of the current the wire sticks to the magnet and it is very difficult to find a point where the wire shows the same affect and still not reaching the magnet and doesn?t stick to it. It is simply a mechanical difficulty in my simple test.

>>>> As these wires are flexible and also carry a high current the magnet in the swing ? >>>>
Yes. Two vertical thin wires are flexible enough and still can easily carry current up to 5 A.

>>>> will repel the holding wires, so the total swing goes out to one side....>>>>
Yes.

Again. It doesn?t matter at all what wires are getting in more interaction with the magnet, vertical, horizontal or something else. The point is that the max distance of the swing from the magnet at the moment when the current just starts flowing SHOULD NEVER exceed the point where the swing stops (calms down) WHILE the current is STILL flowing.

Kames.

[hartiberlin]

Again. It doesn?t matter at all what wires are getting in more interaction with the magnet, vertical, horizontal or something else. The point is that the max distance of the swing from the magnet at the moment when the current just starts flowing SHOULD NEVER exceed the point where the swing stops (calms down) WHILE the current is STILL flowing.

Kames.

Hi Kames, thanks for the info.
But I guess it is just the same as kicking a football away...
Asthe magnet already has its field always there and when you energize
the wire, the forces are very big and so the wirejust accelerates away and
flies off.
But it is a different distance, if both repell forces just sit there and repell
each other. That way the wire will not be so far away as there was no acceleration.

Pretty logical, or did I miss again something ?

Regards, Stefan.

[kames]

Hi Stefan,

Yes, you did miss something again  Neither of the piece of the physical matter, wire, football ball? can go beyond a point than a potential energy was put in. In my test it does. Potential energy is the current I put into the wire. Kinetic energy out is the physical movement of the wire. It moves beyond the point/level of the potential energy I put into it.

Note: the wire is connected in series with a resistor, which impedance is by several orders greater than the impedance of the wire itself. Think about it.

By the way. When I said that I think I found a way of measuring the energy by electrical means (not only physical movement) in my test, I just recalled what SM said:
??We are just talking about a straight piece of wire, some electrons and a method of measuring what comes out of it??

Kames.

[hartiberlin]

Hmm,
I had another look again at your video.
Well I think these are 2 different things.

If the swing comes back on stays in the air at a distance ,
the gravity pull force and the magnetic repell force are just equal.
But this is at a lower height, than when the swing was accelerated
and went out...
I think you compare here "apples with oranges" as to speak so...
Surely if you kick the swing away, it will go further out than the above case,
when the gravity pull force and the magnetic repell force are just equal
and its stays elongated out..