Korzystamy ze wzoru:

$\frac{{\text{U}}_2}{{\text{U}}_1}=\frac{{\text{N}}_2}{{\text{N}}_1}$  

Obliczamy kolejne wartości w tabeli:

• kolumna 1

$\frac{{\text{N}}_2}{{\text{N}}_1}=\frac{{\text{U}}_2}{{\text{U}}_1}=\frac{5,5\sout{\text{V}}}{220\sout{\text{V}}}$  

$\frac{{\text{N}}_2}{{\text{N}}_1}=0,0025$  

• kolumna 2

$\frac{{\text{N}}_2}{{\text{N}}_1}=\frac{{\text{U}}_2}{{\text{U}}_1}=\frac{5,5\sout{\text{V}}}{110\sout{\text{V}}}$   

$\frac{{\text{N}}_2}{{\text{N}}_1}=0,05$  

• kolumna 3

Przekształcamy wzór i obliczamy napięcie 1:

$\frac{{\text{N}}_2}{{\text{N}}_1}=\frac{{\text{U}}_2}{{\text{U}}_1}\text{/}\cdot {\text{U}}_1$  

$\frac{{\text{N}}_2}{{\text{N}}_1}\cdot {\text{U}}_1=\frac{{\text{U}}_2\cdot \sout{{\text{U}}_1}}{\sout{{\text{U}}_1}}$  

$\frac{{\text{N}}_2}{{\text{N}}_1}\cdot {\text{U}}_1={\text{U}}_2\text{/}\cdot \frac{{\text{N}}_1}{{\text{N}}_2}$    

$\frac{\sout{{\text{N}}_2}}{\sout{{\text{N}}_1}}\cdot \frac{\sout{{\text{N}}_1}}{\sout{{\text{N}}_2}}\cdot {\text{U}}_1={\text{U}}_2\cdot \frac{{\text{N}}_1}{{\text{N}}_2}$  

${\text{U}}_1={\text{U}}_2\cdot \frac{{\text{N}}_1}{{\text{N}}_2}=\frac{{\text{U}}_2}{\frac{{\text{N}}_2}{{\text{N}}_1}}$   

Wstawiamy dane liczbowe:

${\text{U}}_1=\frac{10\text{V}}{22}$  

${\text{U}}_1\approx 0,45\text{V}$  

• kolumna 4

Przekształcamy wzór i obliczamy:

$\frac{{\text{N}}_2}{{\text{N}}_1}=\frac{{\text{U}}_2}{{\text{U}}_1}\to {\text{U}}_2=\frac{{\text{N}}_2}{{\text{N}}_1}\cdot {\text{U}}_1$   

${\text{U}}_2=\frac{{\text{N}}_2}{{\text{N}}_1}\cdot {\text{U}}_1=44\cdot 220\text{V}$  

${\text{U}}_2=9680$  

Uzupełniamy tabelę:

N2/N1	0,025	0,05	22	44
U1 [V]	220	110	0,45	220
U2 [V]	5,5	5,5	10	9680