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Current density in two dielectric environments

  1. Apr 25, 2016 #1
    1. The problem statement, all variables and given/known data
    Review of the current field junction at the crossover of two linear surface , such as
    Figure 6. The ratio of the relative permitivity environment is εr2 / εr1 = 3. The current density vector J1 in the he first environment , closes with the normal to the split surface angle
    α1 = π / 6, and the intensity of this vector is J1 =1μA/mm^2 .
    On crossover surface, there is no surface free of charge. Determine the intensity of vector J2 in the 2nd environment
    Elektrijada_6_zad.png
    photo hosting


    2. Relevant equations
    J = σE
    tan(α1)/ tan(α2) = ε1 / ε2

    3. The attempt at a solution
    Elektrijada_6_zad.png
    pic upload

    I don't have relation between σ1 and σ2 , so I don't know how to solve this.
    Correct solution is d) 1.732 μA/mm^2
     
  2. jcsd
  3. Apr 30, 2016 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
     
  4. May 2, 2016 #3
    Not really , I would really need someone to give me little help.
     
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