Apolythene piece rubbed will wool is found to have a negative charge of `3.0xx10^(-7)C`. (a) Estimate the number of electrons transferred (from which to which )? (b) Is there a transfer of mass from wool to polythene?

Apolythene piece rubbed will wool is found to have a negative charge o

1.	Apolythene piece rubbed will wool is found to have a negative charge of `3.0xx10^(-7)C`. (a) Estimate the number of electrons transferred (from which to which )? (b) Is there a transfer of mass from wool to polythene?
Answer» (a) Since the polythene piece acquires a negative charge (q) on rubbing with wool, electrons are transferred from wool to polythene. If n is the number of electrons transferred, then `q="ne"` or `n=(q)/(e )=(3xx10^(7)C)/(1.6xx10^(-19)C)=1.875xx10^(12)` (b) Mass transferred from wool to polythene is `(1.875xx10^(12))(9.1xx10^(-31)kg)=1.7xx10^(-18)Kg` of course, this mass is negatively small.

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Apolythene piece rubbed will wool is found to have a negative charge of `3.0xx10^(-7)C`. (a) Estimate the number of electrons transferred (from which to which )? (b) Is there a transfer of mass from wool to polythene?

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