Question

Trafo step up mengubah tegangan 20V menjadi 200V. Kumparan sekunder dihubungkan kelampu 200V/40W. Jika efisiensi Trafo 80%, kuat arus pada Kumparan primer sebesar

Answer 1

Verified answer

Vp = 20 volt
Vs = 200 volt
Ps = 40 watt
η = 80%
Ip?

penyelesaian:
Ip = Ps . 100% / Vp . η

Ip = 40 . 100% / 20 . 80%

Ip = 40 / 16

Ip = 2,5 Ampere

Answer 2

Verified answer

Diket :
Vp = 20 v
Vs = 200 v
Ps = 40 w
ef = 80%

Dit : Arus primer.......?

Jwb :

# Arus sekunder

Is = Ps / Vs
Is = 40 / 200
Is = 0,2 A

# Arus primer

Ip = ( Vs . Is / ef . Vp ) .100%
Ip = ( 200 . 0,2 / 80% . 20 ) . 100%
Ip = ( 40 / 16 ) . 1
Ip = 2,5 A

Jadi arus pd kumparan primernya 2,5 A