Question

The ratio of electric force betweem 2 electrons to the gravotational force between them is of the order of?

Answer 1

let the distance between them to be `r`

`F_g=(Gm_1m_2)/(r^2)`

`F_c=(Kq_1q_2)/r^2`

From a google search we find

`q_e=1.6*10^-19 C`
`m_e=9.1*10^-31 Kg`
`G=6.67*10^-11 m^3/(Kgs^2)`
`K=9*10^9 (Nm^2)/C^2`

`F_c/F_g=[Kq^2]/[Gm^2]` `=(9*10^9*2.56*10^-38*10^11*10^62)/(6.67*82.81)`

`=0.0417*10^44` a very big number because electrons have extremly small mass