Bonsoir !
Exercice 3.
P = U × I
a) P = 220 × 3 = 660 W
b) • I = 1 A → P = 220 × 1 = 220 W
• I = 2 A → P = 220 × 2 = 440 W
• I = 4 A → P = 220 × 4 = 880 W
• I = 5 A → P = 220 × 5 = 1 100 W
• I = 6 A → P = 220 × 6 = 1 320 W
• I = 7 A → P = 220 × 7 = 1 540 W
• I = 8 A → P = 220 × 8 = 1 760 W
• I = 9 A → P = 220 × 9 = 1 980 W
• I = 10 A → P = 220 × 10 = 2 200 W
Exercice 4.
a) 40 min ≈ 0.67 h
[60 min = 1h
40 min = ?h
? = 40/60 ≈ 0.67]
• 2130 x 0.67 = 1 427,1
Pour 40 min de calcul, elles paieront environ 1 427 €
b) 2h12 min = 2h + (12/60) h = 2h + 0.2h = 2.2h
• 2 130 × 2,2 = 4 686
Pour 2h12 de calcul, elles paieront 4 686 €
c) 3h25 = 3h + (25/60) h = 3h + 0.4 ≈ 3.04h
• 2 130 × 3.04 = 6 475,2
Pour 3h25 min de calcul, elles paieront environ 6 475 €
d) 1 jour 2h et 30s = 24 + 2 + 0.008 = 26,008 h
1 jour = 24 h
30s = 0.008 h
[car 1h = 3600s
? = 30s
et ? = 30/3600 ≈ 0.008]
• 2 130 × 26.008 ≈ 55 387,04
Pour 1 jour 2h et 30 s de calcul, elles paieront environ 55 387 €
