What purpose did the electrically charged plates have in the oil drop experiment?
Millikan oil drop experiment: The purpose of Robert Millikan’s oil drop experiment (1909) was to measure the electric charge of the electron. He did this by carefully balancing the gravitational and electric forces on tiny charged droplets of oil suspended between parallel charged metal plates.
What was the result of Millikan’s oil drop experiment?
Millikan oil-drop experiment, first direct and compelling measurement of the electric charge of a single electron. Millikan was able to measure both the amount of electric force and magnitude of electric field on the tiny charge of an isolated oil droplet and from the data determine the magnitude of the charge itself.
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 of the following charges can not be present on an oil drop in Millikan’s experiment?
Answer: The correct answer is Option a, c and d. Explanation: Millikan’s oil drop experiment is used to measure the charge of an electron. Before this experiment, the subatomic particles were not accepted.
Which of the following charge is not possible?
The Possible values of electric charge are q = ± 1e; ± 2e; ± 3e… Charge less than the charge on an electron (i.e. e = 1.6 * 10-19 C) is not possible. Hence, C & D are not possible.
What oil did Millikan use?
vacuum pump oil
How do you solve Millikan’s oil drop experiment?
Eliminate r from above equations to get the charge, q=4πρg3E[9ηv2ρg]3/2. q = 4 π ρ g 3 E [ 9 η v 2 ρ g ] 3 / 2 . Substitute given parameters in above equation to get q=8.0×10−19C q = 8.0 × 10 − 19 C . Note that charge on oil drop is integral multiple of charge on an electron.
What did Millikan’s experiment prove?
Millikan’s oil drop experiment proved that electric charge is quantized. Millikan believed that there was a smallest unit of charge, and he set out to prove it. This was the big result of the oil drop experiment. That he could also determine the charge of the electron was a secondary benefit.
How many negative charges does the drop contain?
37 negative charges
How do you find the radius of oil drop?
By observing the terminal velocity of a drop it is possible to determine its radius. r=√9ηv2(ρoil−ρair)g.
What is the radius of a small oil drop while falling through air acquires?
An oil drop falls through air with a terminal velocity of 5×10-4sec viscosity of air is 1.8×10-5N-sm2 and density of oil is 900 kg m3 neglect density of air as compared to that of oil. The terminal velocity of a drop of half of this radius is 1.25×10-4msec.
When was Millikan oil drop experiment?
August 1913
What is the charge on a single electron?
The charge on a single electron is -1.6 x 10 -19 Coulomb. The charge on a single proton is +1.6 x 10 -19 Coulomb. The quantity of charge on an object reflects the amount of imbalance between electrons and protons on that object.
Will Millikan oil drop experiment work in a vacuum?
1 Answer. Ernest Z. Millikan used vacuum pump oil for his experiment.
Which oil is used in Millikan oil drop experiment?
Paraffin oil
What is the function of Lycopodium powder in oil drop experiment?
The lycopodium powder helps to show where the oil is. 6 Using the rule, measure the diameter of the oil film on the surface of the water.
Is oil negatively charged or positively?
As for oil, it is a non-polar chemical. Since the atoms in the fatty acids in oil share their electrons nicely, they (usually) have no charge, or at least not enough to make the whole molecule polar. Given their lack of positive or negative charge, they are not attracted to a polar molecule like water.
How do you tell if a molecule is positively or negatively charged?
That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons. When you are missing an electron or two, you have a positive charge. When you have an extra electron or two, you have a negative charge.
What happens if you mix detergent and oil?
It is attracted to both water and oil molecules. Detergent grabs onto both types of molecules causing oil droplets to be suspended in the water. When you shake the jar the detergent molecules adhere the water and oil together forming an emulsion.
What will happen if you mix food coloring and oil?
The Science Behind It When you add the food coloring to the oil it will not mix. Once you add the oil to the water, the food colored droplets start to drop down since they are heavier than the oil. Once they drop into the water they start to dissolve and look like tiny explosions (or fireworks).
What will happen when you mix food coloring and oil?
If it sinks, it’s denser, if it floats, it’s less dense. This is a simple experiment, but with really great effects and good scientific concepts. Kids will love the explosion of color once the food coloring makes it through the oil. You will love the ease of setup and cleanup.
What will happen when soy sauce is mixed with cooking oil?
Answer. They will not mix and the oil will probably go up because oil is less dense than water.
What will happen if you mix soy sauce and vinegar?
Answer Expert Verified. Mixing soy sauce and vinegar will result in a homogenous mixture. A homogenous mixture is substances that dissolve completely when combined. Heterogeneous mixtures are substances that retain their physical composition when mixed.
What will happen when soy sauce is mixed with cooking oil r h Brainly PH?
Answer. Answer: Soy sauce gets trapped under the oil, then boils.
Did the cooking oil dissolve with soy sauce?
Answer: No, because cooking oil is immiscible/less dense in soy sauce.