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Trafo memiliki kumparan primer 2000 lilitan dan kumparan sekunder 800 lilitan apabila tegangan primer 200 Volt kuat arus primer 4 A dan kuat arus sekunder 2 A hitunglah: a.tegangan sekunder (vp) B. efisiensi trafo

Rani Maharani

Soal

Trafo memiliki kumparan primer 2000 lilitan dan kumparan sekunder 800 lilitan apabila tegangan primer 200 Volt kuat arus primer 4 A dan kuat arus sekunder 2 A hitunglah:

a.tegangan sekunder (vp)

B. efisiensi trafo

Diketahui:

Jumlah lilitan kumparan primer (N1) = 2000 lilitan

Jumlah lilitan kumparan sekunder (N2) = 800 lilitan

Tegangan primer (V1) = 200 Volt

Kuat arus primer (I1) = 4 A

Kuat arus sekunder (I2) = 2 A

a. Tegangan sekunder (V2):

Kita dapat menggunakan persamaan dasar transformator:

V1/V2 = N1/N2

Sehingga,

V2 = V1(N2/N1)

V2 = 200 x (800/2000)

V2 = 80 Volt

Jadi, tegangan sekunder (V2) adalah 80 Volt.

b. Efisiensi trafo:

Efisiensi trafo dapat dihitung menggunakan persamaan:

Efisiensi (%) = (P2/P1) x 100%

di mana P1 adalah daya input dan P2 adalah daya output. Daya dapat dihitung dengan persamaan:

P = V x I

Daya input (P1) adalah:

P1 = V1 x I1

P1 = 200 x 4

P1 = 800 Watt

Daya output (P2) adalah:

P2 = V2 x I2

P2 = 80 x 2

P2 = 160 Watt

Sehingga,

Efisiensi (%) = (P2/P1) x 100%

Efisiensi (%) = (160/800) x 100%

Efisiensi (%) = 20%

Jadi, efisiensi trafo adalah 20%.

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