Are E and B Fields Always Perpendicular?

  • Context: Undergrad 
  • Thread starter Thread starter Valayar
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SUMMARY

The discussion clarifies that electric (E) and magnetic (B) fields are not always perpendicular. While in electromagnetic waves, E and B fields appear perpendicular to each other and to the direction of propagation (the Poynting vector), this is not universally true. In static charge configurations or when currents are present, E and B fields can exist at various angles relative to each other. This nuanced understanding is essential for accurately interpreting electromagnetic phenomena.

PREREQUISITES
  • Understanding of electromagnetic theory
  • Familiarity with the Poynting vector
  • Knowledge of static charge configurations
  • Basic principles of electric and magnetic fields
NEXT STEPS
  • Study the relationship between electric and magnetic fields in static conditions
  • Explore the Poynting vector and its implications in wave propagation
  • Investigate the behavior of E and B fields in various charge configurations
  • Learn about Maxwell's equations and their role in electromagnetic theory
USEFUL FOR

Students of physics, electrical engineers, and anyone interested in advanced electromagnetic theory will benefit from this discussion.

Valayar
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Hello,

Is it always true that (E|B) = 0 ?

If the answer is "no". In which cases is it true ?

Thank you !
 
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Even in electromagnetic waves, as they are generated by oscillations of charges, E is not perpedicular to B. What seems to happen here is that the non perpendicular component of these fields to the direction of propagation (Poynting vector) falls more intensely than the perpendicular component. Therefore, far way, we are likely to observe just E and B perpendicular to each other and also to the direction of propagation.

If you set charges in static regime and set currents with other charges you will probably fill the space with E's and B's which are not perpendicular to one another mostly.

best wishes

DaTario
 

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