If a body contains $10^{24}$ electrons and $10^{26}$ protons,the total amount of charge on the body is . . . . . . $C$.

Discuss the types of electric charges by rubbing appropriate non-conductors. Which scientist gave their names?

Select the correct alternative.

If $10^{9}$ electrons move out of a body to another body every second,how much time is required to get a total charge of $1 \, C$ on the other body?

While doing his experiment,Millikan one day observed the following charges on a single drop:
$(i)$ $6.563 \times 10^{-19} \ C$
$(ii)$ $8.204 \times 10^{-19} \ C$
$(iii)$ $11.50 \times 10^{-19} \ C$
$(iv)$ $13.13 \times 10^{-19} \ C$
$(v)$ $16.48 \times 10^{-19} \ C$
$(vi)$ $18.09 \times 10^{-19} \ C$
From this data,the value of the elementary charge $(e)$ was found to be:

The number of electrons in $2 \ C$ of charge is: