Joule Thief 101

[MileHigh]

Oh right.
So if i place my hand over the superconductor,it will produce a current flow and a magnetic field.

What about that fact that the superconductors field matches the every move of the PMs field,and so the PM remains stationary. Try doing that with two PMs in opposition. I remember verpies talking about this frozen field theory some where--will have to find that.

Brad

You can't possibly not know what I mean by "Mr. Hand," or could you?

Let's forget about superconductors and focus on the question.

We are all waiting for you to shine and answer the modified question with the real coil.  I personally don't think you can do it.

[partzman]

Here is an interesting discussion and exchange in the link below-

http://physics.stackexchange.com/questions/62664/how-can-ohms-law-be-correct-if-superconductors-have-0-resistivity

Therefore, I ask the following questions.  Can an AC voltage be applied to a superconducting coil?  If yes, is there a rise time limit and if so why? If there is no rise time limit, can a stepped voltage be applied? If not, why? What happens if we maintain the stepped voltage indefinitely?

partzman

[tinman]

 author=MileHigh link=topic=8341.msg483915#msg483915 date=1463060077]

   

No, there are not going to be any stream of consciousness plays or bait and switch plays here.  There is nothing about friction in this discussion at all, nothing.

Wicked,a frictionless shopping kart.
About time,as i hate how those things never want to drive straight

"For every action force there is an equal and opposite reaction force."

Yes,but when there is another force acting upon the two bodies,then the action/reaction forces can be divided between the three forces--not just the two you see MH. All will add up to be the same,but that dose not mean it is between the person pushing the shopping cart,and the shopping cart it self.

and when you switch over to the electrical domain it applies to a voltage source energizing an inductor.

But you said a voltage cannot exist across an ideal inductor when a DC current is flowing through it.
This contradicts you placing a voltage source across an ideal inductor to induce a current flow
WT-* MH ?.

Action: a rocket pushes out exhaust...
    Reaction: the exhaust pushes the rocket forward.

Well technically it's not the exaust that pushes the rocket forward,as the accelerated mass pushing on the rocket housing,hasnt actually left the rocket engine housing yet--so it's not yet an exausted gas.

Brad

[tinman]

You can't possibly not know what I mean by "Mr. Hand," or could you?

Let's forget about superconductors and focus on the question.

Yes MH. You think it is the energy used to move the magnet into position that creates the apposing magnetic field in the superconductor.
But as we know,we could replace that PM with a piece of non magnetized steel,lift it into position with our hand,and it would have no effect at all--same energy,no result.

We are all waiting for you to shine and answer the modified question with the real coil.  I personally don't think you can do it.

I personally dont care what you think,as im interested only in your original question.

Now what you have to do,is explain to everyone here,how you can say that a voltage cannot exist across an ideal inductor that has a DC current flowing through it,and then say you are going to produce a DC current through an ideal inductor by placing a voltage across it 


Brad

[MileHigh]

Brad:

<<< Wicked,a frictionless shopping kart.
About time,as i hate how those things never want to drive straight >>>

This is just you being the class clown/bozo.  The question has nothing to do with friction at all.  Another failed attempt to get through to you.

<<< Yes,but when there is another force acting upon the two bodies,then the action/reaction forces can be divided between the three forces--not just the two you see MH. All will add up to be the same,but that dose not mean it is between the person pushing the shopping cart,and the shopping cart it self.  >>>

Explain yourself properly if you can.  As it stands physics rules and the two forces are equal and opposite while the shopping cart accelerated.  This is high school physics.

<<< But you said a voltage cannot exist across an ideal inductor when a DC current is flowing through it.
This contradicts you placing a voltage source across an ideal inductor to induce a current flow  >>>

How can it be contradictory if when you place a voltage across an ideal inductor you do not get DC current?

<<< Well technically it's not the exaust that pushes the rocket forward,as the accelerated mass pushing on the rocket housing,hasnt actually left the rocket engine housing yet--so it's not yet an exausted gas.  >>>

You are playing the clown/bozo again.