a) Q = I t = 0.015 A * 10 s = 0.15 C
b) N = Q/|e| = 0.15 / (1.6 * 10^(-19)) ~ 9.4 * 10^17
1 Coulomb = 1A*1sec
0,015 A * 10 sec = 0,15 Coulomb
n = 6,24*10*18 el./Coulomb * 1,5/10 Coulomb = 9,36*10^17 elettroni
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