Request about experiments on the linear-motion Faraday paradox

[greswd]

after the disc breaks its pieces must get only füther and füther from each other as time passes. EMF is not directed to center of disc, but crosswise to it if time from breaking approaces infinity. polarizing effects lack to exist as time from breaking approaches infinity.

But it becomes linear straightaway when it breaks though. Straightaway.

 

[greswd]

E,B,v are different in different frames of reference, but meaningful(frame invariant) claims same in all frames of reference. E,B,v are different in frames of reference, where linear generator is in rest and where it is moving, but whether it is generating power or not is same in both frames of reference.

But it doesn't explain why use the angular velocity when the LFL depends on linear velocity.

 

[greswd]

if the disc breaks into pieces then each individual piece effectively becomes a small linear faraday generator because even a single electron rotating above a homogeneous B field experiences the Lorentz force and would be deflected sideways and the same thing happens in a conducting element being dragged through a B field at 90 degree angle which is essentially the Faraday disc.

Again the physics to the best of my knowledge does not change whether in the rotational or linear scenario.

But let's say the conductor and the magnet are moving together, at the same speed.

In the rest frame, no Lorentz force. But in the moving frame, you might expect a Lorentz force. Some people argue that there is an induced electric field that counters the magnetic force in the moving frame.

But then you might wonder why this doesn't apply to the rotational case.

Hence the request for transitional experiments.

 

[olgerm]

But it becomes linear straightaway when it breaks though. Straightaway.

Yes, but EMF approxes zero over time. Pieces are moving, in this case, relative to magnet. That is why this may produce EMF, but linear generator, where circut moves with magnet would not.

But it doesn't explain why use the angular velocity when the LFL depends on linear velocity.

What is LFL?

But let's say the conductor and the magnet are moving together, at the same speed.
In the rest frame, no Lorentz force. But in the moving frame, you might expect a Lorentz force. Some people argue that there is an induced electric field that counters the magnetic force in the moving frame.

post #68 explains exactly that.

 

[greswd]

Yes, but EMF approxes zero over time. Pieces are moving, in this case, relative to magnet. That is why this may produce EMF, but linear generator, where circut moves with magnet would not.

But what about the disc getting polarized when disc and magnet rotate together?

What is LFL?

Lorentz Force Law

post #68 explains exactly that.

But the point I'm making is:

But then you might wonder why this doesn't apply to the rotational case.

Hence the request for transitional experiments.

 

[olgerm]

But what about the disc getting polarized when disc and magnet rotate together?

rotational faraday generator works if disc rotates with magnet. What about it?

But then you might wonder why this doesn't apply to the rotational case.

Because realtions I assumed in post #68 are not valid in rotational case(like $(\vec{v}\cdot \nabla)\vec{B}=\frac{\partial \vec{B}}{\partial t}$)

 

[artis]

it doesn't matter whether the magnet is moving together (physically attached to the conductor) or conductor simply moving through a homogeneous B field created by a stationary magnet, as long as the conductor cuts B field lines the result is the same and it's the same for both rotating circular discs as well as flat linearly moving pieces of conductor, same rules apply , in all cases to get useful current there needs to be relative motion between conductor and current pickup circuit.

I feel the OP has some sort of confusion with regards to the matter.

 

[olgerm]

it doesn't matter whether the magnet is moving together (physically attached to the conductor) or conductor simply moving through a homogeneous B field created by a stationary magnet, as long as the conductor cuts B field lines the result is the same and it's the same for both rotating circular discs as well as flat linearly moving pieces of conductor

If magnet moves lineary together with circuit, then the circuit does not produce EMF.

 

[artis]

sure , that is what I said , but if magnet moves linearly together with conductor and the circuit that closes the loop moves with a different speed then there is current in the loop, well there should be.

 

[greswd]

But it doesn't explain why use the angular velocity when the LFL depends on linear velocity.

@olgerm just a reminder, thanks

 

[greswd]

sure , that is what I said , but if magnet moves linearly together with conductor and the circuit that closes the loop moves with a different speed then there is current in the loop, well there should be.

but what about when we ignore circuits and just focus on polarization within the conductor, which I've mentioned a few times

 

[artis]

well I think there is polarization , charged particles experience a force when they move through a magnetic field , any magnetic field for that matter.

But I haven't done any such experiments nor measured the polarization so then you would have to ask people with experience