Who represented the quantization of electric charge first and on what basis?

What is the order of current flowing during lightning in the sky?

Which of the following charges is possible?
$(a)\ 3.2 \times 10^{-20} C$ $(b)\ 3.2 \times 10^{-18} C$
$(c)\ 3 \times 10^{-19} C$ $(d)\ 6 \times 10^{-17} C$

$A$ $1$ paisa coin is made up of an $Al-Mg$ alloy and weighs $0.75\, g$. It has a square shape and its diagonal measures $17\, mm$. It is electrically neutral and contains equal amounts of positive and negative charges. Calculate the total amount of positive or negative charge in the coin.

$A$ conductor has $14.4 \times 10^{-19} \ C$ of positive charge. The conductor has (Charge on an electron $= 1.6 \times 10^{-19} \ C$):

Consider a neutral conducting sphere. $A$ positive point charge is placed outside the sphere. The net charge on the sphere is then,