Thompson's Absolute Electrometer

  • Thread starter X53
  • Start date
  • Tags
    Absolute
In summary, two discs charged with opposite quantities of electricity are held together by the force of attraction between them, even after the weight is removed. This implies that the electric force between them is equal to the force from the weight. This can be explained by the equation Wg = (V^2A)/[(8PI)D^2], where V is voltage, A is the area of the top disc, D is the distance between them. The significance of 8pi in the equation is not mentioned.
  • #1
X53
12
0
Suppose that the force needed to push a disc down on top of another disk = weight x g, then the two discs are charged with opposite quantities of electricity, then the weight removed, and still the discs remain together due to the force of attraction between the discs; so then the electric force between them is equal to the force from the weight, right? this implies that Wg = (V^2A)/[(8PI)D^2], V is voltage, A is the area of the top disc, D is the distance between them: How to explain the equation? what is the significance of 8pi?
 
Last edited:
Physics news on Phys.org
  • #2
X53 said:
Suppose that the force needed to push a disc down on top of another disk = weight x g, then the two discs are charged with opposite quantities of electricity, then the weight removed, and still the discs remain together due to the force of attraction between the discs; so then the electric force between them is equal to the force from the weight, right? this implies that Wg = (V^2A)/[(8PI)D^2], V is voltage, A is the area of the top disc, D is the distance between them: How to explain the equation? what is the significance of 8pi?
Why doesn't anyone answer?
 

What is Thompson's Absolute Electrometer?

Thompson's Absolute Electrometer is a device used to measure the absolute value of electric charge. It was invented by British physicist Joseph John Thomson in the late 19th century.

How does Thompson's Absolute Electrometer work?

The electrometer consists of two parallel metal plates, one fixed and one movable, with a small gap between them. A voltage is applied to the plates, causing a force to act on the movable plate, which can be measured to determine the electric charge present.

What is the purpose of Thompson's Absolute Electrometer?

The purpose of this instrument is to accurately measure the absolute value of electric charge, as opposed to just measuring the difference in charge between two points.

What are the advantages of using Thompson's Absolute Electrometer?

Compared to other electrometers, Thompson's Absolute Electrometer is more accurate and has a wider measurement range. It is also less affected by external factors such as temperature and humidity.

How is Thompson's Absolute Electrometer used in scientific research?

Thompson's Absolute Electrometer is used in various fields of research, such as in the study of atomic and subatomic particles, as well as in the calibration of other instruments used to measure electric charge. It has also been used in experiments related to the fundamental constants of nature.

Similar threads

I How Do Eddy Current Dampers Work in Space Applications?
    • Electromagnetism
Replies
4
Views
281
I Current through U-wire (rail gun): Violation of (naive) conservation of momentum?
    • Electromagnetism
2
Replies
61
Views
2K
Why dielectrics get polarized instead of directly ionized?
    • Electromagnetism
Replies
13
Views
1K
Find spring constant k using an electrical circuit
    • Introductory Physics Homework Help
Replies
10
Views
909
Electric field within a battery
    • Electromagnetism
2
Replies
51
Views
6K
How do we know the mass of an electron?
    • Electromagnetism
Replies
28
Views
2K
Force from "like charges" with and without movement
    • Electromagnetism
Replies
8
Views
1K
I 3 clocks thought experiment - Absolute vs. relative aspects?
    • Special and General Relativity
2
Replies
50
Views
2K
The rotating disk of Albert Einstein
    • Special and General Relativity
2
Replies
54
Views
8K
Really confused about voltage and some other quetions
    • Electromagnetism
Replies
2
Views
956

Hot Threads

Recent Insights

Back
Top