Measuring Amps on output coils

[Low-Q]

Current flow has everything to do with voltage. If you have no potential difference,then current will not flow. The voltage differential may be very small,but there has to be one. I must also ask how current flows in ferrite magnet's,as the ferrite is non conductive,and even if it were,you would have nothing but a dead short. A dead short with current flowing through it means extensive heat-->PMs do not get hot sitting on the bench.

You're right if you consider the energy source as the voltage drop. The voltage drop over the super conductor is zero, but current is still flowing.
Inducing current flow through a super conductor using a passing magnet, there is no voltage present anywhere but the current is flowing still.


The point is that Ampere or Voltage alone cannot be considered as energy. Only the product of them are energy.


Vidar

[tinman]

You're right if you consider the energy source as the voltage drop. The voltage drop over the super conductor is zero, but current is still flowing.


The point is that Ampere or Voltage alone cannot be considered as energy. Only the product of them are energy.


Vidar

Inducing current flow through a super conductor using a passing magnet, there is no voltage present anywhere but the current is flowing still.

Where is it flowing?. In order to have a flow,it must have direction. So in a super conductor,which direction is this flow of current?. The same question would apply to the PM. We often use waterand pipes to explain current flow through a wire. Is a super conductor represented by a bucket full of water,or a looped pipe that is full of water?. If so,in order for the water !current! to flow,there must be a differential in pressure !voltage!. I see no way current can flow in a super conductor,a PM or any other circuit without a potential difference in voltage. It is assumed that a super conductor can produce a magnetic field,but that is not the case. It becomes diamagnetic,as a super conductor will repell both fields of a magnet. So the magnetic field seen in a super conductor is a mirror of the magnetic field that it is exposed to. Magnetic fields are actually excluded from super conductors-this is called the Meissner effect. You may be confused to what they call the induced super currents,which are the mirror field of the PM above the super conductive surface.

[MarkE]

Where is it flowing?. In order to have a flow,it must have direction. So in a super conductor,which direction is this flow of current?. The same question would apply to the PM. We often use waterand pipes to explain current flow through a wire. Is a super conductor represented by a bucket full of water,or a looped pipe that is full of water?. If so,in order for the water !current! to flow,there must be a differential in pressure !voltage!. I see no way current can flow in a super conductor,a PM or any other circuit without a potential difference in voltage. It is assumed that a super conductor can produce a magnetic field,but that is not the case. It becomes diamagnetic,as a super conductor will repell both fields of a magnet. So the magnetic field seen in a super conductor is a mirror of the magnetic field that it is exposed to. Magnetic fields are actually excluded from super conductors-this is called the Meissner effect. You may be confused to what they call the induced super currents,which are the mirror field of the PM above the super conductive surface.

It takes energy to initially induce the current.  The current is induced in a super conductor just as it is in an ordinary coil winding.  An induced voltage builds up current in the coil against the inductance of the loop.  Thus work is performed to transfer energy into the magnetic field surrounding the super conductor.

[Low-Q]

Where is it flowing?. In order to have a flow,it must have direction. So in a super conductor,which direction is this flow of current?. The same question would apply to the PM. We often use waterand pipes to explain current flow through a wire. Is a super conductor represented by a bucket full of water,or a looped pipe that is full of water?. If so,in order for the water !current! to flow,there must be a differential in pressure !voltage!. I see no way current can flow in a super conductor,a PM or any other circuit without a potential difference in voltage. It is assumed that a super conductor can produce a magnetic field,but that is not the case. It becomes diamagnetic,as a super conductor will repell both fields of a magnet. So the magnetic field seen in a super conductor is a mirror of the magnetic field that it is exposed to. Magnetic fields are actually excluded from super conductors-this is called the Meissner effect. You may be confused to what they call the induced super currents,which are the mirror field of the PM above the super conductive surface.

If we take water - good you brought it up. It is easier to understand.


The bucket: Waterpressure at the bottom will cause the flow from the hose connected to the buckets bottom. Voltage is pressure. Ampere is the flow. Higher pressure, higher flowrate.


Superconductor: A hose is looped like a donut. Water does not "see" friction in the wall inside, and will continue to flow forever in a loop when it has started.


Have you ever tried the experiment at school when you cool down an object that becoms super conductive when cooled down?
Placing a magnet on top of it will cause the magnet to hover.
When you approach the magnet, eddy currents are starting to build up in the superconductor and keep flowing - making an equal and oposite magnetic field. This current is continuing to flow "forever" as long the object is superconductive, but no voltage is applied - only the "pressure" from the magnet you put over it. No matter how the magnet will move (up, down or sideways) the superconductor is "charged" by eddy currents that all the time reposition the magnetic field respectively to the magnets position. That is why the magnet is hovering at the same place and not fall off to the sides. If you press the magnet further down, more eddy curent builds up, also the magnetic field from the superconductor increase, and is stronger than the magnets weight. The magnt returns back to the same position again - balancing between its weight and the magnetic force from the superconductor trying to push it away.


Vidar

[tinman]

It takes energy to initially induce the current.  The current is induced in a super conductor just as it is in an ordinary coil winding.  An induced voltage builds up current in the coil against the inductance of the loop.

Thus work is performed to transfer energy into the magnetic field surrounding the super conductor.

There is no magnetic field surrounding a super conductor.