Respostas

2013-09-09T19:53:26-03:00
250mA = 250*10^-3A = 0,25A
i = Q / /\t

0,25 = Q / 1

************
Q = 0,25C
************

Q = n * e

0,25 = n * 1,6*10^-19

25*10^-2 / 1,6*10^-19 = n

n = 15,625 * 10^17

**********************************
n = 15.625 * 10^14 elétrons.
**********************************
3 5 3