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Nouvelle force à distance:

Nouvelle force à distance:. La force électrique !. p. e -. n. Structure de la matière. Frottements:. chiffon. ébonite, caoutchouc. -. +. verre, acrylique. -. +. e ~ 1,602 ´ 10 -19 C Les charges du proton et de l’électron valent donc : q p = + e q e = - e.

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Nouvelle force à distance:

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  1. Nouvelle force à distance: La force électrique !

  2. p e- n Structure de la matière Frottements: chiffon ébonite, caoutchouc - + verre, acrylique - + e ~ 1,602 ´ 10-19 C Les charges du proton et de l’électron valent donc : qp = + eqe = - e La charge électrique totale d’un système isolé reste constante.

  3. + + + + + + + + + + + + Isolants: q1 = Q q2 = 0 Conducteurs et isolants Conducteurs: + + + + q1 = Q q2 = 0 q1 = Q/2 q2 = Q/2

  4. Conducteurs et isolants Conducteurs: + Isolants: + + - polarisation de l’isolant

  5. Charge par conduction: + + + + + + + + Charge par induction: + + + + + + + + + + - - + - + -

  6. La loi de Coulomb La loi de Coulomb • F a Q1 • F a Q2 • F a 1/r² permitivité du vide: e0» 8,85 ´ 10-12 C2/Nm2

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