006

De primaire stroom I is

a   500 mA
b   50 mA
c   25 mA
d   20 A

Is = Us / Urs = 12 / 12 = 1 A

n = Up/Us = 240/12 = 20

n = Is/Ip ...>>> Ip = Is/n = 1/20 = 50 mA

037

P = P   Up * Ip = Us * Is

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