a) The charge q on a body is always given by q=ne, where n is any integer, positive or negative.
b) By convention, the charge on an electron is taken to be negative.
c) The fact that electric charge is always an integral multiple of e is termed as quantisation of charge.
d) The quantisation of charge was experimentally demonstrated by Newton in 1912.
Doubt by Sonali
Solution : The quantisation of charge was experimentally demonstrated by R.A. Millikan in 1909 not by Newton in 1912. So the last d) statement is incorrect.
Hence, d) would be the correct option.
