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  • A polythene piece rubbed with wool is found to have a negative charge of 3 × 10–7 C. Is there a transfer of mass from wool to polythene?

Q 1.11(b): A polythene piece rubbed with wool is found to have a negative charge of 3\times 10^{-7}C. Is there a transfer of mass from wool to polythene?

Answers (1)

best_answer

The charge attained by polyethene (and also wool!) is solely due to the transfer of free electrons.

We know, Mass of an electron = 9.1\times10^{-31}\ kg

 The total mass of electron transferred = Number of electrons transferred x Mass of an electron

=  9.1\times10^{-31} \times 1.8\times10^{12}\ kg = 16.4\times10^{-19} \ kg

Yes, there is a transfer of mass but negligible.

Posted by

HARSH KANKARIA

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