Transformation 26961

The output voltage of the transformer is 880 V. The secondary coil has 1200 turns. Determine the voltage to which the primary coil is connected and how many turns it has if a current of 1 A flows through it. The transformation ratio is k = 4. What current flows through the secondary coil?

Correct answer:

u₁ =  220 V
n₁ =  300
I₂ =  0.25 A

Step-by-step explanation:

$$\begin{gathered} u_2=880\text{V} \\ {n}_2=1200 \\ {I}_1=1\text{A} \\ k=4 \\ k=\frac{u_2}{u_1}=\frac{n_2}{n_1}=\frac{I_1}{I_2} \\ {u}_1=u_2/k=880/4=220\text{V} \end{gathered}$$

$n_1=n_2/k=1200/4=300$

$I_2=I_1/k=1/4=0.25\text{A}$

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