NCERT · Class 12 · Physics · Electric Charges and FieldsState the principle of quantization of electric charge.

The principle of quantization of electric charge states that the total charge on any body is always an integral multiple of a basic fundamental unit of charge, which is the charge of an electron. Mathematically, it is represented as $q = \pm ne$, where $n$ is an integer ($n = 1, 2, 3, \dots$) and $e$ is the elementary charge ($1.6 \times 10^{-19}\text{ C}$). Charge exists in discrete packets rather than continuous amounts.