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TOPIC: Question 9 *

Question 9 * 3 years 5 months ago #468

Un dipôle électrique plongé dans un champ électrique subit

A. une force électrique nulle quand le champ est non-uniforme et que le dipôle est perpendiculaire aux lignes de champ.
B. une force électrique nulle quand le champ est uniforme, quelle que soit l’orientation du dipôle par rapport à celle des lignes de champ.
C. une force électrique maximale quand le champ est non-uniforme et que le dipôle est perpendiculaire aux lignes de champ.
D. une force électrique maximale quand le champ est uniforme et que le dipôle est perpendiculaire aux lignes de champ.
E. Aucun des choix précédents.
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Re: Question 9 3 years 5 months ago #469

Contexte
Electrostatique
Champ électrique
Dipôle


Question
Question de compréhension concernant la force exercée sur un dipôle plongé dans un champ électrique


Solution
Enoncé tel quel dans le cours.

Courte explication :
Dans un champ électrique uniforme, la force exercée sur les pôles du dipôle sera égale en norme et de sens opposé.
Le dipôle aura bien tendance à tourner pour s'aligner sur le champ électrique mais la force résultante est nulle.


Références cours
Elec_Ch2_ALL_Dias.pdf slide 96
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