Magnet Myths and Misconceptions

[TinselKoala]

Im guessing you mean a homopolar generator Mag's,not a homopolar motor.
So are saying there is a lenz force,and some are saying there is not. The only way to find answers is to build one i guess. As copper plate here is extremely expencive,i guess i will have to melt down some copper pipe,and make my own disk-say around 12 inches in diameter.Then to wind some very large coils for electromagnet's,as PM's that size would cost an arm and leg.

Copper is nice because of its low resistance, and resistance is what kills homopolar dynamos. After all, when your generator voltage is only one or two volts maximum, it doesn't take much resistance to cut the current to nothing, even if there is a _lot_ of power available. But you don't have to use copper, you can use aluminum, it will work almost as well.
But there are plenty of torque-rpm graphs already available in the DePalma-Tewari work.

[vineet_kiran]

When you subject a current carrying conductor to extreme repulsion, conductor itself will bend but electrons will not be ejected out.   Why?

Does it mean that electrons are tightly held to mass of the conductor?   If moving electrons are tightly held to the conductor, how they will move? 

And why they are called free electrons???  (when they cannot jump out of conductor subjected to repulsion?)

Can some 'genius' answer it?

Movement of a large number of electrons is responsible for producing a strong magnetic field in a coil or in a PM.   Magnetic field produced by an individual electron would be very less.  Hence even if you bring a very strong repelling pole near a coil,   force experienced by individual electron will be neglible and it will not be ejected out of the coil.

If you create a very strong density of magnetic flux combining several strong magnetic fileds and bring a coil near it,  then individual electrons may experince strong force and will be ejected out of coil.

Same thing would have happenned in Philadelphia experiment, where a person entering into strong magnetic field started  emitting blue flame.    All electrons in his body would have been ejected out and his body would have got positively charged!
 

[Newton II]

If you create a very strong density of magnetic flux combining several strong magnetic fileds and bring a coil near it,  then individual electrons may experince strong force and will be ejected out of coil.

That would lead to an interesting experiment.   Take a lengthy wire, keep one end  immersed inside a strong magnetic field having very high flux density  and connect the other end of the wire to earth.   Electrons will be  ejected out from the wire at magnetic end creating a positive potential which causes  flow of electrons from earth to that  end of the wire.  But when electrons come to that spot,  they will be ejected out from that spot again.   So, a perpetaul flow of electrons is maintained in the wire from earth to magnetic end resulting in perpetual electric current!!!

[tinman]

That would lead to an interesting experiment.   Take a lengthy wire, keep one end  immersed inside a strong magnetic field having very high flux density  and connect the other end of the wire to earth.   Electrons will be  ejected out from the wire at magnetic end creating a positive potential which causes  flow of electrons from earth to that  end of the wire.  But when electrons come to that spot,  they will be ejected out from that spot again.   So, a perpetaul flow of electrons is maintained in the wire from earth to magnetic end resulting in perpetual electric current!!!

Now wouldnt that be nice if it were true.

[vineet_kiran]

That would lead to an interesting experiment.   Take a lengthy wire, keep one end  immersed inside a strong magnetic field having very high flux density  and connect the other end of the wire to earth.   Electrons will be  ejected out from the wire at magnetic end creating a positive potential which causes  flow of electrons from earth to that  end of the wire.  But when electrons come to that spot,  they will be ejected out from that spot again.   So, a perpetaul flow of electrons is maintained in the wire from earth to magnetic end resulting in perpetual electric current!!!

You can do one thing.   Take a wire which extends from earth to outer space.  Connect a photosensitive plate on one end of the wire at outer space and connect  the other end of wire to earth.    Photons from sun  falling on photosensitive plate eject electrons out from the plate by photoelectric effect.    Hence there will be a perpetual flow of electrons from earth to outer space producing perpetual electric current in the wire because sun's life is infinite compared to our lifespan.