In 1909, Robert Millikan
Why is the Millikan oil drop experiment important?
Millikan’s experiment is important
because it established the charge on an electron
. Millikan used a very simple a very simple apparatus in which he balanced the actions of gravitational, electric, and (air) drag forces. Using this apparatus, he was able to calculate that the charge on an electron was 1.60 × 10−19 C.
What was the conclusion of Millikan’s oil drop experiment?
Thus, Millikan’s Oil Drop Experiment concludes that
the charge is said to be quantized
, which means that the charge on any particle will be an integral multiple of e always. Millikan discovered the charge on a single electron using a uniform electric field between the oil drops and two parallel charged plates.
What experiment did Millikan do and what did it discover?
March 22, 1868 – December 19, 1953
Robert Millikan was a physicist who discovered
the elementary charge of an electron using the oil-drop experiment
.
Can you explain Millikan’s oil drop experiment detailed?
Millikan’s oil drop experiment
measured the charge of an electron
. … Electrically charged oil droplets entered the electric field and were balanced between two plates by altering the field. When the charged drops fell at a constant rate, the gravitational and electric forces on it were equal.
Why did Millikan use oil instead of water?
Professor Millikan has made several innovations to improve the experiment. First, droplets of oil are used instead of water,
to reduce the tendency of the droplets to evaporate while the experiment is being performed
. … was later traced to the fact that Millikan’s value of the viscosity of air had been a little low.
Which oil is used in Millikan oil drop method?
Ernest Z. Millikan used
vacuum pump oil
for his experiment.
When was Millikan oil drop experiment conducted?
Robert Millikan’s famous oil drop experiment, reported in
August 1913
, elegantly measured the fundamental unit of electric charge.
What was Ernest Rutherford’s experiment?
Ernest Rutherford’s most famous experiment is
the gold foil experiment
. A beam of alpha particles was aimed at a piece of gold foil. Most alpha particles passed through the foil, but a few were scattered backward. This showed that most of the atom is empty space surrounding a tiny nucleus.
What did Millikan conclude?
Millikan, carrying out a long and tedious task that involved a set of collateral experiments, repeated the experiment numerous times, eventually concluding that
the results obtained could be explained if there was a single, elementary charge (the value of which he determined) and the charges identified were integer
…
What important fact did Millikan’s experiment established?
Millikan’s experiment established that
‘electric charge is quantised’
that means the charge present on any object is an integral multiple of charge of an electron.
What are possible charges of oil droplets?
The tabulated data are examples of a few possible values. (CC BY 4.0; OpenStax). Looking at the charge data that Millikan gathered, you may have recognized that the charge of an oil droplet is always a multiple of a specific charge,
1.6×10−19C.
Why do some oil droplets move up and some down?
Why do some droplets move up and others down? 2. Why have some of the droplets stopped moving? Oil drops that are moving up either contain many electrons or have a low mass (or both), as the force they
experience due to the electric field is greater than their weight
.
Can we use water in place of clock oil?
Answer:
no, we can’t use water in it
. Explanation: Because the intermolecular forces of water molecules is less than the oil.
How many negative charges does the drop contain?
The drop contains
37 negative charges
.
How do you know the charge of an electron?
Since the value of the elementary charge is roughly 1.602 x 10
– 19
coulombs (C), then the charge of the electron is -1.602 x 10
– 19
C. When expressed in atomic units, the elementary charge takes the value of unity; i.e., e = 1. Thus, the electron’s charge can be denoted by
-e
.
