[tex]dane:\\U_{p} =24 \ V\\I_{p} = 4 \ A\\U_{w} = 144 \ V\\szukane:\\I_{w} = ?\\\\Rozwiazanie\\\\\frac{U_{w}}{U_{p}} = \frac{I_{p}}{I_{w}}\\\\U_{w}\cdot I_{w} = U_{p}\cdot I_{p} \ \ /:U_{w}\\\\I_{w} = I_{p}\cdot\frac{U_{p}}{U_{w}}\\\\I_{w} = 4 \ A\cdot\frac{24 \ V}{144 \ V}\\\\I_{w} = 4 \ A\cdot\frac{1}{6}\\\\I_{w} = \frac{2}{3} \ A \approx0,67 \ A[/tex]
