Electric Flux Density Theory
Electric Flux Density Theory
(OP)
It is my understand that the electric flux decreases as the permittivity of a medium increases. This makes since, because permittivity is the resistance of a medium to an electric field. However, this seems to contradict the formula
D = (permittivity)E
where D is the electric flux and E is the electric field intensity. Base on this formula it seems that the electric flux increases as permittivity increases.
What am I missing?
D = (permittivity)E
where D is the electric flux and E is the electric field intensity. Base on this formula it seems that the electric flux increases as permittivity increases.
What am I missing?





RE: Electric Flux Density Theory
If you fix the applied voltage and distance between electrodes, then (under parallel plate type / uniform field assumptions), E = V / distance is constant. Increasing Epsilon would increase D for this given fixed E.
If you fix the free charge, then D is constant. Increasing Epsilon would decrease E. The physical situation would be two floating electrodes with charge... insert different dielectrics between those electrodes and measure voltage.
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(2B)+(2B)' ?
RE: Electric Flux Density Theory
Mathematically this makes sense, because as impedance Z decreases permittivity ε increases as does electric flux D given a fixed electric field intensity E according to D = εE .