The transfer of integral number of ____________ is one of the evidence of quantization of electric charge.
Fill in the blank with the correct answer from the options given below.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → electrons
Quantization of charge means every charge is an integral multiple of the basic charge \( e \): \( q = ne \). When bodies are charged by rubbing, it is electrons that pass from one body to the other, and they can only be transferred whole, so the charge gained or lost is always \( ne \).
NCERT (2026-27):
Electric Charge – “… In solids, some of the electrons, being less tightly bound in the atom, are the charges which are transferred from one body to the other.”
Quantisation of Charge – “… If the protons and electrons are the only basic charges in the universe, all the observable charges have to be integral multiples of e.”