Question

In Millikan's famous oil-drop method for determining the charge on an electron, the experimental measurements show that the oil-drops gain a whole or integral number of charges, because.
A. The charges multiples of the smallest charge
B. The oil-drop is never stationary
C. The oil-drop falls with a terminal velocity
D. The oil drops are circular

Answer 1

The above problem can be resolved using the fundamentals of Millikan's oil drop experiments. The Millikan's oil drop experiment is carried out for the purpose of finding out how big the size of negatively charged species known as the electrons. The electrons are the basic charged particles that had significance in various experimental analyses carried out, from time to time to prove various theories of quantum mechanics.

Complete step by step answer:
Millikan’s oil drop experiment is a practical analysis carried out to identify the size carried by the negatively charged particle known as the electron. In this experiment, it is concluded that the electronic charges are the multiples of the smallest charge, and this shows that the oil-drop acquires the whole number of charges or the integral number of charges.
Therefore, in Millikan’s oil drop experimentation the measurements show that the oil-drops gain whole or integral number of charges as the charges are the multiples of the smallest charges

So, the correct answer is “Option A”.

Note:
Try to understand the whole experiment carried under the Millikan to conclude some important results under his experiment, like the electron's size and the significance of such electrical charges. Moreover, the electrons carried out as the prime subject of the experiment; the electronic significance is not cleared during that time. Furthermore, the electrons are the basic sub-particles that play a major role in many physics applications involving modern physics and quantum physics.