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Verified answer
Diket :ef = 90 %
Pp = 4500 w
Is = 18 A
dit : Ph & Vs ?
jwb :
# Daya sekunder
Ps = ( Pp . ef ) . 100%
Ps = ( 4500 . 90% ) . 100%
Ps = 4050 watt
# Daya yg hilang terbuang
Ph = Pp - Ps
Ph = 4500 - 4050
Ph = 450 watt
# Teg . sekunder
Vs = Ps / Is
Vs = 4050 / 18
Vs = 225 volt