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= 12² v /60 ohm .600 s
= 144/60 . 600
= 1.440 J
R = 60 ohm
V = 12 v
t = 10 mnt → 10x60 = 600 s
Dit :
W = ....?
Jwb:
W = V²/R x t
= 12²/60x600
= 144/60x600
= 1.440 J (b)