A polythene piece rubbed with wool is found to have negative charge of `3 xx 10^-7 C`. Estimate the number of electrons transferred.

Answer

`1.875 xx 10^12`

Explanation

As `Q = "ne", n = (Q)/( e)= (3 xx 10^-7 C)/(1.6 xx 10^-19 C) = 1.875 xx 10^12`.