Respostas

2013-07-30T22:55:06-03:00
 mc = 10 elevado -6

t = q. U  mas E.d = U
logo:
t = q. E.d
t = q. (Va-Vb).d
t = 4.10^ -6. (500-300).1
t = 200*4.10^-6 
t= 800.10^-6=8.10^-8
2013-07-30T23:24:40-03:00
Tab=q.(va-vb)
tab=4.10^-6(500-300)
tab=4.10^-6 .200
tab=8.10^-8