1. Permittivity and loss index
1.1 Perfect dielectric
Placed in a vacuum, under DC voltage U0, a planar capacitor (figure 1a)takes on a charge Q0 related to U0 by a linear law :
Q0 = C0U0
with :
- C 0 :
- capacitor capacity in a vacuum.
If we isolate the source armatures and fill the capacitor with insulating material (figure 1b), the new potential difference U that appears is still proportional to Q0 :
Q0 = CU...
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Permittivity and loss index
Resistivity
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