Question

1) Quantos elétrons são necessários para se ter uma carga (Q) de:

A) 8x10 sobre -15 C
B) 19,2 mc
C) 24 mc
D) 12,8 mc
E) 12,2 mc
F) 14,4x10 sobre -15 C

Answer 1

a) Formula Q = n * e
8*$10^{-15}$ = n * 1,6*$10^{-19}$
8*$10^{-15}$/1,6*$10^{-19}$=n
n=5*$10^{4}$

b)19,2mc=1,92*$10^{-3}$
1,92*$10^{-4}$=n*1,6*$10^{-19}$
1,92*$10^{-4}$/1,6*$10^{-19}$=n
n=1,2*$10^{15}$

c)24mc=2,4*$10^{-4}$
2,4*$10^{-4}$=n*1,6*$10^{-19}$
2,4*$10^{-4}$/1,6*$10^{-19}$=n
n=1,5*$10^{15}$

d)12,8mc=1,28*$10^{-4}$
1,28*$10^{-4}$=n*1,6*$10^{-19}$
1,28*$10^{-4}$/1,6*$10^{-19}$=n
n=0,8*$10^{15}$

e)12,2mc=1,22*$10^{-4}$
1,22*$10^{-4}$=n*1,6*$10^{-19}$
1,22*$10^{-4}$/1,6*$10^{-19}$=n
n=7,625*$10^{14}$

f)14,4*$10^{-15}$ = n * 1,6*$10^{-19}$
1,44*$10^{-14}$/1,6*$10^{-19}$=n
n=0,9*$10^{5}$

Espero ter ajudado