Question

Um corpo tem uma carga igual a -32. 10-6 C. Quantos elétrons há em excesso nele?

a)20x10^13


b)-20x10^13


c)2,0x10^13


d)-2,0x10^13


e)NDA

Answer 1

a) 2*10^14 electrons

Step-by-step explanation:

To find the amount of electrons you take into account that:

`1C=6.2415*10^(18)electrons`

by replacing this values in the factor C of the charge given by the exercise you obtain:

`-32*10^(-6)C=-32*10^(-6)(6.2415*10^(18)electrons)\approx2*10^(14)electrons`

= 2*10*10^13 =20*10^13 electrons (you take the absolute value)

hence, the total number of electrons in a charge of 32*10^-6 C is 2*10^13 electrons