^^Campo elettrostatico di 2 cariche opposte, cioe' di uguale intensita' e segno opposto.

2 cariche opposte = dipolo elettrico.

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2 sferette, carica opposta (Realta' e modello accostati)

Solo modelli.

Animation showing the electric field of an electric dipole. The dipole consists of two point electric charges of opposite polarity located close together. A transformation from a point-shaped dipol to a finite-size electric dipole is shown. wikimedia/File:VFPt_dipole_animation_electric.gif

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.odg