[tex]dane:\\P = 0,8 \ kW = 800 \ W\\U = 14,4 \ V\\t = 8 \ s\\szukane:\\a) \ I = ?\\b) \ W = ?\\\\Rozwiazanie\\\\a)\\P = U\cdot I \ \ /:U\\\\I = \frac{P}{U}\\\\I = \frac{800 \ W}{14,4 \ V}\\\\\underline{I = 55,(5) \ A \approx \ 55,6 \ A}[/tex]
[tex]b)\\P = \frac{W}{t} \ \ /\cdot t\\\\W = P\cdot t\\\\W = 800 \ W\cdot 8 \ s\\\\\underline{W = 6 \ 400 \ J = 6,4 \ kJ}\\\\(1 \ kJ = 1000 \ J)[/tex]
