Magnetic field vs Electric field

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Discussion Overview

The discussion revolves around the relationship between magnetic fields and electric fields, particularly in the context of simulating the behavior of ferrous particles around a cylindrical permanent magnet using an electric field in software. Participants explore the possibility of substituting magnetic effects with electric fields and charged particles.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions whether an electric field can be set to mimic the effects of a magnetic field on ferrous particles, given the constraints of their simulation software.
  • Another participant points out that magnetic and electric fields are orthogonal, which may complicate the substitution proposed.
  • A different participant argues that substituting a magnetic field with an electric field and charged particles to achieve the same attraction force may not be feasible due to the dependence of magnetic force on particle velocity.
  • There is a claim that it is possible to have an electric field parallel to a magnetic field, challenging the orthogonality assertion.
  • One participant introduces an equation relating magnetic and electric fields, seeking clarification on its derivation.
  • A later reply suggests that the motion of small particles with induced electric dipole moments in an electric field can be analogous to the behavior in a magnetic field.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of substituting electric fields for magnetic fields in simulations, with no consensus reached on the validity of the proposed approaches or the implications of field orientation.

Contextual Notes

There are unresolved assumptions regarding the conditions under which electric fields can effectively replace magnetic fields, particularly concerning particle velocity and field orientation.

Methavix
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Hi all,
I have to simulate the behavior of a stream of ferrous particles (no electrical charge) that moves axially around a cylindrical permanent magnet. The software I use allows me to set only an electric field. Can i set an electric field equivalent to the magnetic field? I know the magnetic induction, and I know material, size and velocity of particles.
thanks
 
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You know the magnetic and electric fields are orthogonal, right??

And both are transverse (orthogonal) to the direction of propagation.
 
yes, but this is not regarding my problem
i would substitute the magnetic field and ferrous particles with an equivalent electric field and charged particles, in order to have the same final effect (i.e. the same attraction force).
 
I don't think that is possible in general since the magnetic force depends on the velocity. Unless the software would allow you to make the e-field depend on the velocity.
 
Naty1 said:
You know the magnetic and electric fields are orthogonal, right?

That's not true. I can have an E field parallel to a B field.
 
Hi there all,
I want to know something about this equation specially about how we can derive it from the simple ones
B=vχE/sqr(c)​
where, v is velocity of the source of E and c is speed of light.

tnx in advance,
 
The motion will be the same as that for small particles with induced electric dipole moments in an electric field which is the same as the actual B field.
 

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