> Why Change Of Magnetic Flux Induces Current In It?

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Discussion Overview

The discussion revolves around the phenomenon of electromagnetic induction, specifically why a change in magnetic flux through a coil induces an electric current. Participants explore the implications of moving magnets or electromagnets and the distinction between changing and constant magnetic flux.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants inquire about the behavior of charges in a coil when subjected to a moving magnetic field.
  • One participant notes that the question is complex and lacks a simple answer, prompting others to share their current understanding and educational background.
  • A participant references Maxwell's equations as fundamental to understanding the relationship between electric and magnetic fields, suggesting that this is a basic principle of classical electrodynamics.
  • Another participant claims that the phenomenon can also be explained through special relativity, challenging the notion that classical physics is insufficient for this explanation.
  • One participant expresses uncertainty about their previous statements and acknowledges a misunderstanding.

Areas of Agreement / Disagreement

Participants express differing views on the sufficiency of classical physics versus special relativity in explaining electromagnetic induction. There is no consensus on a singular explanation or understanding of the phenomenon.

Contextual Notes

Participants have varying levels of knowledge in magnetism and electricity, which may influence their interpretations and explanations. The discussion includes references to advanced theories and fundamental laws without resolving the complexities involved.

Who May Find This Useful

This discussion may be of interest to individuals studying electromagnetism, particularly those exploring the principles of electromagnetic induction and the interplay between electric and magnetic fields.

Ankit
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Why change of magnetic flux with the time through a coil induces current in it?
Please tell me that what happen to charge in the coil if the magnet or electromagnet wave around this? Also, why a constant magnetic flux does not induces current?
 
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This is a pretty involved question that doesn't have a simple answer. What do you know about it currently? What's your level of education in the subject?
 
Drakkith said:
This is a pretty involved question that doesn't have a simple answer. What do you know about it currently? What's your level of education in the subject?

I am the beginner in magnetism but intermediate in electricity.
 
As far as classical electrodynamics goes ( I don't know if more advanced theories of physics shed more light on this question ) this is one of maxwell's four fundamental postulates ( or equations ) of electrodynamics. So within the framework of the classical theory, this is simply how it works. It's a fundamental law and is just so. Electric and magnetic fields are just linked in this fundamental way. Incidentally, a time varying electric flux through a coil will also induce a circumferential magnetic field and this law displays a compelling symmetry with the other one.
It's kind of like asking why there exists a force of attraction between two opposite charges. You took that for granted didn't you ?
 
It's a consequence of special relativity (SR) so, contrary to siddharth5129's statements, classical physics can perfectly well explain its origin. However if you don't know SR then I'm not sure how effectively one could explain it to you. In any event I would recommend taking a look at chapter 3 of Schwartz "Principles of Electrodynamics".
 
oh. I'm sorry. My bad then.
 

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