Teman-teman,
Saya mau nanya masalah daya listrik nih...
Terus terang saya masih agak bingung dengan konsep daya listrik ini...
SEingat saya dulu waktu masih SMP pernah diajari di mata perlajaran 
fisika rumus daya listrik yaitu:

P = V x I x T
Daya (watt) = beda arus (Volt) x Kuat arus (Ampere) x Waktu (detik)

Nah kalau kita lihat lampu dituliskan misalkan 20 watt... lha 20 watt 
hubungan dengan waktunya gimana??? apakah 20 watt/detik atau 20 
watt/menit atau 20 watt/jam???

TIA
(Thanx In Advance)

Sony





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