Source: https://www.devoir.tn/secondaire/3-%C3%A8me-ann%C3%A9es/Sciences-exp%C3%A9rimentales/Physique/S%C3%A9ries/S%C3%A9ries-physique/s%C3%A9rie-n%C2%B01-interaction-%C3%A9lectrique--2010-2011%28alibi-anouar%29%5Bmaknassy%5D.pdf