Joule Thief 101

[tinman]

Wouldnt the magnet floating over the super cooled superconducting disk, block, whatever it is, be a perfect example of ideal cemf producing an equal opposing field in order for the float to happen?

Mags

That is a perfect example Mags.
A magnetic field from a PM inducing a current flow in the super conductor which produces an equal and opposite magnetic field to that which created it. The PM remains perfectly still,and shows us a true equal and opposite reaction--an ideal state.

Of course MH will try and skip past this,as it dose not agree with the answer he wants everyone to believe.
Ask him to work out the math that gives rise to this situation-how is this perfect and ballanced situation allowed to take place?--well because it's an ideal situation.


Brad

[minnie]

   The superconductor excludes any magnetic field and this must be
   considered an effect DISTINCT from zero resistance.
        John.

[tinman]

   The superconductor excludes any magnetic field and this must be
   considered an effect DISTINCT from zero resistance.
        John.

https://en.wikipedia.org/wiki/Meissner_effect
In Type II superconductors, raising the applied field past a critical value Hc1 leads to a mixed state (also known as the vortex state) in which an increasing amount of magnetic flux penetrates the material, but there remains no resistance to the flow of electric current as long as the current is not too large.


Brad

[MileHigh]

Well Brad, you are still stuck in your rut I see.

Here is a little story for you to contemplate.

You go to the supermarket to shop for food.  You get a huge amount of stuff and your shopping cart is very heavy.  You are stopped, and then you push on the cart with a continuous even force.  How about that - the heavy shopping cart is pushing back at you with exactly the same amount of force.  You also notice that the shopping cart is starting to speed up and you have to keep quickening your pace.

Think about this:  What if the shopping cart was a "magic" 22nd century shopping cart and instead of being on four wheels with bearings, the shopping cart floated one inch above the floor through magnetic levitation.  That means when you push on it it glides frictionlessly across the floor.

Think about this:  Imagine the shopping cart is stopped, and it has infinite mass.  Then, you push on it and then no matter how long and no matter with how much force, the shopping cart doesn't budge an inch.

Can you learn anything from this Brad?

MileHigh

[tinman]

Well Brad, you are still stuck in your rut I see.

Here is a little story for you to contemplate.


Think about this:  What if the shopping cart was a "magic" 22nd century shopping cart and instead of being on four wheels with bearings, the shopping cart floated one inch above the floor through magnetic levitation.  That means when you push on it it glides frictionlessly across the floor.

Think about this:  Imagine the shopping cart is stopped, and it has infinite mass.  Then, you push on it and then no matter how long and no matter with how much force, the shopping cart doesn't budge an inch.



MileHigh

You go to the supermarket to shop for food.  You get a huge amount of stuff and your shopping cart is very heavy.  You are stopped, and then you push on the cart with a continuous even force.  How about that - the heavy shopping cart is pushing back at you with exactly the same amount of force.  You also notice that the shopping cart is starting to speed up and you have to keep quickening your pace.

Maybe the shopping cart is not pushing back at you with exactly the same force,as if it did,it(and you) would not move--how about that?. The shopping cart losses some of that force to motion--think man.
Something ilearned from MarkE,when we were talking about air ram's.
I too thought like you,until Mark explained how when one object is motionless,and the other can move,then the one that is moved by the force that is motionless is not pushing back as hard as the motionless force-something like that,cant quite remember.

Can you learn anything from this Brad?

Yes
You need to touch up on some of the things you believe to be true.

Edited


Brad