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Verified answer
Diket :Vp = 25 v
Vs = 250 v
ef = 80%
Ps = 50 w
dit : Pp & Ip
jwb :
# Daya primer
Pp = ( Ps / ef ) . 100%
Pp = ( 50 / 80 % ) . 100%
Pp = ( 50 / 80 ) . 100
Pp = 62,5 watt
# Arus primer
Ip = Pp / Vp
Ip = 62,5 / 25
Ip = 2,5 A