200m 200m 104 mA~ 12 Changement de calibre
On branche une « résistance » aux bornes d'un ohmmetre.
Sur le calibre 2 Mo, l'ohmmètre affiche < .009 ».
Sur le calibre 20 kg, l'ohmmètre affiche « 9.93 »>.
1. Quelle est, en ohm, la résistance mesurée avec le calibre t
2 Mo, puis avec le calibre 20 ke ?
2. Quelle est la mesure la plus précise ?

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