Exercitiile 1, 2 si 3, fara 4 si 5, va rog frumos.
A nu se lua in considerare inscrierile

1. I=600 mA=0,6 A
t=5 min=300 s
Q=It=0,6*300=1800 C
2.I=400 mA=0,4 A
t=25 min=1500 s
Q=It=0,4*1500=600 C
Q=Ne=>N=Q/e=600/1,25*10⁻¹⁹=4,8*10²¹ electroni
3.t=2 h=6400 s
Q=It=>I=Q/t=1800/6400=0,28 A