[tex]Dane:\\U=30V\\R=60 \Omega\\t=1min=60s[/tex]
[tex]Szukane:\\W=praca[/tex]
[tex]Wzor:\\P=\frac{W}{t} \\P = U*I\\W = P*t=U*I*t[/tex]
Zgodnie z prawem Ohma:
[tex]R = \frac{U}{I}\\\\I = \frac{U}{R}[/tex]
[tex]W = U*I*t=U*\frac{U}{R} *t=\frac{U^2*t}{R}= \frac{30^2*60}{60}=900J[/tex]
