A glass rod is rubbed with a silk cloth. The glass rod acquires a charge of `+19.2xx10^(-19)C`.
(i) find the number of electrons lost by glass rod.
(ii) Find the negative charge acquired by silk.
(iii) Is there transfer of mass from glass to silk?

Explanation

(i) The number of electrons lost by galss rod is
`n=q/e=(19.2xx10^(-19))/(1.6xx10^(-19))=12`
(ii) Chaege on silk is `-19.2xx10^(-19)C`.
(iii) Since an electron has a finite mass `(m_(e)=9xx10^(-31) kg)`, there will be transfer of mass from glass rod to silk cloth. Mass transferred `=12xx(9xx10^(-31))=1.08xx10^(-29)kg`.
Note that mass transferrred is negligibly small. This is expected because the mass of an electrons is extremely small.