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Verified answer
Diket :Np = 30
Ns = 10
Vs = 3 v
Dit : Tegangan primer......?
Jwb :
Vp = ( Np . Vs ) / Ns
Vp = ( 30 . 3 ) / 10
Vp = 90 /10
Vp = 9 volt
Jadi tegangan primernya 9 volt