When a piece of polythene is rubbed with wool, a charge of `-2xx10^(-7) C` is developed on polythene. What is the amount of mass, which is transferred to polythene.

Explanation

From Q= ne, So, the number of electrons tranferred `n=Q/(e)=(2xx10^(-7))/(1.6xx10^(-19))=1.25xx10^(12)`
Now mass of transferred electrons`=n xx` mass of one electron`=1.25xx10^(12)xx9.1xx10^(-31)=11.38xx10^(-19) kg`