$A$ stationary charge produces . . . . . . .

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:

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

When $10^{19}$ electrons are removed from a neutral metal plate through some process,the charge on it becomes . . . . . . .

$A$ neutral sphere is bombarded with $10^{12} \, \alpha$-particles per second. How much time in seconds will it take to accumulate a charge of $2 \, \mu C$?

$(a)$ Explain the meaning of the statement 'electric charge of a body is quantised'.
$(b)$ Why can one ignore quantisation of electric charge when dealing with macroscopic, i.e., large-scale charges?