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arus primer (I1)= 0.8 A
arus sekunder(I2) = 0.5A
lilitan primer (N1)=1000
lilitan sekunder (N2)= 800
Dit : efisiensi
Dijawab :
N1/ N2 = V1/ V2
1000 /800 = V1/ V2
5/4 = V1/V2
4/5 = V2/ V1
efisiensi = V2 I 2/ V1 I1 × 100 %
efisiensi = 4 × 0.5 / 5 × 0.8 × 100 %
efisiensi = 20 /40 × 100%
efisiensi = 50 %
maaf kalo salah