Electrostatic Equations for Dielectrics

• Equations are same as in vacuum, but with scaled field

• All interactions between “free” charges can be scaled accordingly

  • Coulomb’s law in a (linear) dielectric

• Dielectric boundaries

  • rfree independent of dielectric
  • implies continuity of eE
    but only normal component
    

constant e

q1 and q2 are free charges

I

II

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