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A polythene piece rubbed with wool is found to have a negative charge of 3 xx 10^(-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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Answer» Solution :`q= 3 xx 10^(-7)C` a. `q=nc, n=q/c =(3 xx 10^(-7))/(1.6 xx 10^(-19)) =2 xx 10^(12)` (SINCE polythene has negative charge, electrons are TRANSFERRED from wool to polythene). b. YES, Mass transferred `=n xx m_(c)=9.1 xx 10^(-31) xx 2 xx 10^(12)=1.82 xx 10^(-18)kg` |
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