Mathematics, 24.02.2021 01:00 kyla1220

On veut installer une DEL (diode électro-luminescente) dans un circuit électrique. On peut compléter le circuit
des deux façons suivantes :
Pour obtenir la même intensité sur la DEL, on montre
en physique que :1/R =1/R1 plus 1/R2
L'unité pour mesurer les résistances R, R, et R, est
Pohm (abréviation ().
1. Calculer R sous forme fractionnaire pour :
a. R, = 22 et R=52 b. R = 422 et R = 1392
c. R, = 112 et R, = 1322
2. Calculer R, sous forme fractionnaire pour:
a. R=622 et R = 242 b. R=1,1,2 et R = 1,72
Chapitre 5 . Multiplier, diviser des quotients

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On veut installer une DEL (diode électro-luminescente) dans un circuit électrique. On peut compléte...