[tex]dane:\\U_{p} = 240 \ V\\n_{p} = 1200\\n_{w} = 300\\szukane:\\U_{w} = ?\\\\Rozwiazanie\\\\\frac{U_{w}}{U_{p}} = \frac{n_{w}}{n_{p}}\\\\U_{w}\cdot n_{p} = U_{p}\cdot n_{w} \ \ /:n_{p}\\\\U_{w} = U_{p}\cdot\frac{n_{w}}{n_{p}}\\\\U_{w} = 240 \ V\cdot\frac{300}{1200}\\\\U_{w} = 240 \ V\cdot\frac{1}{4}\\\\U_{w} = 60 \ V[/tex]
