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V = 220 V
i = 25 A
W = _?
Energi listrik
W = V i t
W = 220 • 25 • t
untuk t = 1 s
W = 220 • 25 • 1
W = 5500 J ← JWB
untuk t = 1 menit = 60 s
W = 220 • 25 • 60
W = 330000 J ← JWB
untuk t = 1 jam = 3660 s
W = 220 • 25 • 3660
W = 19800000 J ← JWB
2][ i = V / R = 220 / 88 = 2,5 A
W = V²/R t = 220²/88 • 600 = 330000 J
3][ t = W / (V i) = 7200 l/ (2 • 12) = 300 s