The fact that electric charges are integral multiples of the fundamental electronic charge was proved experimentally by

If a body is charged by rubbing it,its weight:

Discuss the historical observation of frictional electrics.

$(a)$ 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?

Fill in the blanks:
$(i)$ $A$ static charge produces a ...... field around it. (Electric,Magnetic)
$(ii)$ $A$ moving charge produces a ...... field around it.

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