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- Daya lampu (Pl) = 10 W
- Tegangan lampu (Vl) = 220 V
- Tegangan = 110 V
Dit : Daya keempat lampu?
Jwb :
a. Cari dulu daya 1 lampu :
=
P = ( )
= 10 (
= 2,5 Watt
b. Cari daya 4 lampu :
4 buah lampu x 2,5 Watt
= 10 Watt
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