What really causes electromagnetic induction/ the motor effect?

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SUMMARY

The discussion centers on the fundamental principles of electromagnetic induction and the motor effect, specifically how a changing magnetic field induces electron movement in a conducting wire. It is established that the movement of current in a wire within a static magnetic field results in the wire's motion due to the Lorentz force acting on the charge carriers. The conversation highlights the efficiency of alternating current (A/C) over direct current (D/C) due to reduced resistance and heat generation. Additionally, the stability of the conductor material, such as gold, enhances conductivity and minimizes oxidation.

PREREQUISITES
  • Understanding of electromagnetic fields and forces, specifically the Lorentz force.
  • Knowledge of the differences between alternating current (A/C) and direct current (D/C).
  • Familiarity with the properties of conductors, particularly the stability and conductivity of materials like gold.
  • Basic concepts of electron movement and resistance in conductive materials.
NEXT STEPS
  • Research the principles of electromagnetic induction in detail, focusing on Faraday's law.
  • Explore the characteristics and applications of A/C versus D/C systems.
  • Study the properties of various conductive materials and their impact on electrical efficiency.
  • Learn about the role of the Lorentz force in electromagnetic applications, including motors and generators.
USEFUL FOR

Electrical engineers, physics students, and anyone interested in the principles of electromagnetism and electrical conductivity will benefit from this discussion.

henpen
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When a conducting wire is subjected to a changing magnetic field, what causes the electrons in this wire to move?
Conversely, why does the movement of current in the wire (with a non-'moving' magnetic field) cause the wire to move?
I understand these phenomena macroscopically (and that they are different sides of the same electromagnetic coin), but at the most fundamental level, what happens?
 
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I believe the idea is a called a "Hole Charge."

I don't know exact chemistry of conductors, but basically, they are usually fairly stable.

Electricity is more of a pulling effect.

When you pull one of the electrons from one end of the wire, those atoms pull electrons from neighboring atoms and the "effort" travels up the wire. The "effort" is near the speed of light. The electrons themselves do not travel at the speed of light. In fact, the more they have to travel, the more heat it causes and resistance builds up.

Thus A/C is more efficient then D/C.

The more stable the metal, the better conductor is it makes. For example: Gold is one of the best conductors and does not oxidize like many others. At least, I think so.
 
Fundamentally, a charge experiences the Lorentz force, period. The E and B fields at the charge determine that force.

Note that a changing magnetic field creates an electric field. That's one of the fields that exerts a force on the charge in the case of a time-changing magnetic field.

Every one of Lord Challen's observations is incorrect.
 
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