Lorentz EMF Paradox

Lorentz' EMF paradox

Peng Kuan 彭宽titang78@gmail.com

Thursday, May 31, 2012

One basic notion in the electromagnetic theory is the generation of electromotive force (EMF) by a conductor moving in a magnetic field. This EMF is said to be created by Lorentz force. However, I have shown that the energy conservation law is violated by this explanation. The rigorous proof is in the article B-cutting paradox

http://pengkuanem.blogspot.fr/2012/05/b-cutting.html

https://docs.google.com/open?id=0B3YDEaOyRUwcRzRITFgtdzA5VHc

So, there is a need to better understand the mechanism of EMF generation by Lorentz force. 

Please read the following document.

B-cutting

B-cutting paradox

Peng Kuan 彭宽titang78@gmail.com

Tuesday, May 22, 2012

In several articles I have shown one inconsistency of the Lorentz force law, that Lorentz force internal to a coil violates the third Newton’s law. Below are some links:

Synthesis of the inconsistency of the Lorentz force law
http://pengkuanem.blogspot.com/2012/04/synthesis.html
Mathematical cause of the existence of the remaining resultant internal Lorentz force
http://pengkuanem.blogspot.com/2012/04/mathematical-cause-of-existence-of.html
Proof of the remaining resultant Lorentz force internal to a triangular coil

http://pengkuanem.blogspot.com/2012/04/analyze-of-lorentz-forces-internal-to.html

The Lorentz force law is also used to interpret the generation of an electromotive force in a coil with a wire moving in a magnetic field. Let us look at the Figure 1 in which a rectangular coil with a movable wire is shown. The movable wire is the bar conductor of length l that is constrained to move at the velocity v. An electrical generator provides a current I in the coil that creates a magnetic field B. As the bar conductor moves, it cuts the force lines of the magnetic field B. This is the “B-cutting” action referred in the title.

Curve shape

Curve shape of the magnetic torques

Peng Kuan 彭宽, titang78@gmail.com

Friday, May 11, 2012

In the article The Lorentz torque experiment

(http://pengkuanem.blogspot.com/2012/03/lorentz-torque-experiment.html)

I have given the design of an experiment that tests the predictions of the Lorentz force law and the differential Ampere's force law. The predicted outcome of the experiment is a single-humped curve for the Lorentz force law and double-humped curve for the differential Ampere's force law. This difference of curve's shape is dependent on the coil's dimension. To avoid the confusion that the curve is always single-humped for the Lorentz force law and double-humped for the differential Ampere's force law, I give here the numerical results for coils of 4 different dimensions. The calculation method is described in the article
 Calculation of the Lorentz’ Torque and the Ampere’s torque (http://pengkuanem.blogspot.com/2012/05/torque-calculation.html) .

Comparison

Comparison of the 2 magnetic force laws

 Peng Kuan 彭宽

titang78@gmail.com

Saturday, May 05, 2012

I have given the correct magnetic force law in the article «Correct differential magnetic force law », named the differential Ampere's force law.

Is this law really correct? The unique way to certainty is experiment. However, we can still do theoretical analysis to get more confidence. For example, comparing the comportment of the 2 laws in some particular cases. Let us analyze the magnetic force internal to a triangular coil and near the summits (see the Figure 1). 

......

Please read the following document.

Torque Calculation

Calculation of the Lorentz’ Torque and the Ampere’s torque

Peng Kuan 彭宽

titang78@gmail.com

Thursday, May 03, 2012

In the article «The Lorentz torque experiment», I have proposed an experiment to test the Lorentz force law and the differential Ampere’s force law. The theoretical predictions of the torque on a coil according to the Lorentz force law and the differential Ampere’s force law give different values. The experimental measurement will confirm one law and refute the other. The curve of the Lorentz’ torque and the Ampere’s torque are drawn in the Figure 1.

It is important for the experimenters to know how to do this calculation and why the values are so different. Below is the explanation.

Correct law

Correct differential magnetic force law

Peng Kuan 彭宽

titang78@gmail.com

Tuesday, May 01, 2012

The Internal Lorentz force inconsistency is illustrated by the many contradictions I have provided (read the following documents)

Synthesis of the inconsistency of the Lorentz force law
Mathematical cause of the existence of the remaining resultant internal Lorentz force
Proof of the remaining resultant Lorentz force internal to a triangular coil

All Documents Links

These contradictions are sufficient evidences to break the Lorentz force law down. But how would physics be without the Lorentz force law? In fact, the correct magnetic force law is already there and the above contradictions were demonstrated to clear the way. Indeed, the Lorentz force law is so strong in the mind of physicists that no one accepts a new law without the old one proven to be false.