Transformer

Transformer - U1 = 230 V, N1 = 300, N2 = 1,200, I1 = 4 A. Calculate the transformation ratio, voltage and current in the secondary coil.

Correct answer:

k =  4
U₂ =  920 V
I₂ =  1 A

Step-by-step explanation:

$$\begin{gathered} U_1=230\text{V} \\ {N}_1=300 \\ {N}_2=1200 \\ {I}_1=4\text{A} \\ k=\frac{N_2}{N_1}=\frac{1200}{300}=4 \end{gathered}$$

$U_2=k\cdot U_1=4\cdot 230=920\text{V}$

$$\begin{gathered} U_1\cdot I_1=U_2\cdot I_2 \\ {I}_1=k\cdot I_2 \\ {I}_2=I_1/k=4/4=1\text{A} \end{gathered}$$

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