Odpowiedź:
Latarka
I=[tex] \frac{360}{900} = 0.4[/tex]A
Słuchawki
30min=1800s
I=[tex] \frac{45}{1800} = 0.025[/tex]A
Żarówka
3h=180min=10800s
I=[tex] \frac{2808}{10800} = 0.26[/tex]A