Understanding EM Fields: Storage and Transmission of Energy

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SUMMARY

Electromagnetic (EM) fields are essential for understanding energy storage and transmission. EM fields contain energy and can store it, as seen in capacitors, while also transmitting energy through waves. The distinction between storing and containing energy lies in the context of application—storage refers to the ability to hold energy for later use, while containing refers to the presence of energy within the field itself. The definition provided aligns with established principles, indicating that a changing electromagnetic field induces a magnetic field, as described by Maxwell's equations.

PREREQUISITES
  • Understanding of electromagnetic fields
  • Familiarity with Maxwell's equations
  • Basic knowledge of capacitors and their function
  • Concept of energy transmission via waves
NEXT STEPS
  • Study Maxwell's equations in detail
  • Explore the principles of energy storage in capacitors
  • Investigate the mechanisms of energy transmission through electromagnetic waves
  • Learn about the applications of EM fields in modern technology
USEFUL FOR

Students of physics, electrical engineers, and professionals involved in telecommunications and energy systems will benefit from this discussion on electromagnetic fields and their properties.

spaghetti3451
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I have been told that

1. EM fields contain energy.
2. EM fields can store energy, e.g. capacitors.
3. EM fields can transmit energy, e.g. via waves.

How are 1. and 2. any different from each other?
 
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The two statements say the same thing using different words.
 
Thank you very much for your reply.

To move on, I just want your view on this definition of mine.

An electromagnetic field is an arbitrary configuration of electric fields (either finite or infinite in extent) that is either static or changing in time.

If the electromagnetic field changes in time, a magnetic field is induced whose properties and configurations are given by Maxwell's equations of electromgnetism.

Am I right?
 

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