A polythene piece rubbed with wool is found to have a negative charge of `1muC`. Estimate the number of electrons transferred. Is there any transfer of mass from wool to polythene?

Explanation

Here, ` " " q = -3 xx 10 ^(-7) C `
Charge on one electrons
` " " e= - 1.6 xx 10 ^(-19) C`
` therefore ` Number of electrons transferred from wool to polythene piece,
` n = (q)/(e) = (-3 xx 10 ^(-7) C )/(-1.6 xx 10 ^(-19)C ) `
` " " = 1.875 xx 10 ^(12)`