Dielectric effect on induced electric field.

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SUMMARY

The discussion centers on the dielectric effect on the induced electric field in a homogeneous linear isotropic dielectric when subjected to a time-varying magnetic field. According to Faraday's Law, a time-varying magnetic field induces an electric field, represented by the equation ∇×E = -∂B/∂t. The participants confirm that the dipoles within the dielectric will polarize in response to the induced electric field, effectively reducing the net electric field by a factor of the relative permittivity (ε_r) compared to free space.

PREREQUISITES
  • Understanding of Faraday's Law of Induction
  • Knowledge of dielectric materials and their properties
  • Familiarity with electric field concepts
  • Basic grasp of electromagnetic theory
NEXT STEPS
  • Study the implications of Faraday's Law in different media
  • Explore the behavior of dipoles in various dielectric materials
  • Investigate the concept of relative permittivity (ε_r) and its applications
  • Learn about time-varying fields in electromagnetic theory
USEFUL FOR

This discussion is beneficial for students and professionals in physics, electrical engineering, and materials science, particularly those interested in electromagnetic theory and the behavior of dielectrics in varying fields.

BMPaul
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Hi everyone,

From what I understand if you had a time varying magnetic field inside a dielectric it will induce a time varying electric field according to Faraday's Law:

\nabla\times\mathbf{E}=-\frac{\partial \mathbf{B}}{\partial t}

My question is will the dipoles in the dielectric then polarize to the induced electric field reducing the net electric field in the dielectric (assume the dielectric to be homogeneous linear isotropic dielectric) so that the net electric field is now \varepsilon _{r} time less than if the same thing happened in free space.

Thanks.

PS. this is my first post so tell me if I am doing something wrong or am being vague in what I am asking.
 
Last edited:
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Sorry don't know why I'm getting the maths error. The first equation is Faraday law and the second is the relative permittivity
 

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