Coulomb's Law and its applications in today's society


from PxHere

Xerox machines, laser printers, and powder coating are just a few of the many uses of Coulomb's Law that can be seen in today's world.
Using a rod of amber and rubbing it on your cat's fur can attract feathers and other light objects, according to the ancient peoples of the Mediterranean Sea. Magnetite, for example, was well-known to the ancient Greeks for its magnetic properties.

A distinction was made between magnetism and static electricity by the English scientist William Gilbert in 1600, and he dubbed the static electricity force electricus after the Greek word for "amber." It wasn't until 1767 that the English scientist Joseph Priestley made the formal proposal that the electrical force between two charged objects diminishes with the square of the distance between them. Priestley is most recognized for being the discoverer of the element oxygen as well as the inventor of carbonated water. So, the next time you take a sip of Coca-Cola, remember Joseph Priestley.

In 1785, the French physicist Charles-Augustin de Coulomb published three papers on electricity and magnetism, in which he explained the electrostatic force in greater detail than anybody else. According to Coulomb's Law,

  1. Like charges repel each other and unlike charges attract one another.
  2. The attraction or repulsion between the two charges occurs along a line drawn between them.
  3. In addition to being proportional to the product of their respective charges, force magnitude is also related to the square of their distance from one another
    (see Figure below)

F∝ q1q2
Or, F∝1/r2
F = k q1q2/ r2

The charges' signed magnitudes are q1 and q2, and the distance between them is measured by the scalar r. The newton, the coulomb, and the meter are all units of force, charge, and distance, respectively.

The inverse-square behaviour of the electrostatic force, as described by Isaac Newton's law of universal gravitation, is surprising identical to that of gravity.

Haloid Becomes Xerox
When Chester Carlson was a patent attorney working at the US Patent Office in New York City in 1938, he was a pioneer in the field of intellectual property law. Carlson's arthritic hands made it difficult for him to copy large numbers of documents by hand. He built the first photocopy machine by tinkering around in his kitchen at night.
At least 20 companies, including IBM and General Electric, rejected Carlson's copy machine invention during the period from 1939 to 1944. In 1947, a small New York photographic paper manufacturer, the Haloid Corporation, was granted permission to use Carlson's invention in the development of the copy machine.

The Haloid Corporation was renamed the Xerox Corporation after consulting a professor of classical languages who coined the term "xerography" from the Greek words xeros for dry and graphos for writing.

Duplicates are created by the electrostatic process. In this case, the drum is made of aluminum coated with selenium, which has an unusual property: when in darkness, it acts as an insulator but when exposed to light, it acts as a conductor


Copier inside toner printer

The process of xerography begins with the introduction of negative charge under a thin layer of positively charged selenium during the initial stage of xerographic development.

As a result, the drum surface is exposed to the picture to be reproduced, and where the image is light, the positive charge is neutralized, and where the image is dark, the positive charge remains in place. The image has been transferred to the drum at this point.
This is followed by the application of a black powder, termed toner, that has been charged with a negative charge.

The toner is pulled from the drum by a blank piece of paper that has a higher positive charge than the drum. Finally, the paper and toner are heated rollers that melt and permanently adhere the toner to the paper.

It is the same process that is used in laser printers to create positive-charged images, and the resInkjete process is the same as in xerography. Laser printers can produce high-quality images because laser light can be precisely controlled.

Inkjet printers also use the electrostatic method, which involves spraying tiny ink droplets via a nozzle before applying an electric charge to each one. With the help of charged plate pairs, the droplets are guided onto paper, where they create letters and images. Colour inkjet printers use black, cyan, magenta, and yellow inkjets to produce colour images.

Powder Coating, It's Not Just For Motorcycles

Electrostatic painting or coating commonly referred to as "powder coating," is another application of the electrostatic process. The sprayer and the object to be coated are both charged with high voltage electrostatic currents during the operation.

Electrostatic charge accelerates a covering of powdered particles or atomized liquid toward the workpiece. The ionic bond between the coating and the item results in a homogenous coating with excellent adhesion.

Colour mixing and bleeding can be achieved by applying multiple powder colours before curing them all at once. Because of this, powder coating is a favourite among motorcycle fans throughout the world.


What Are the Applications of Coulomb's Law?
Coulomb’s Law Examples in Daily Life
Coulomb’s Law

Who Am I?

I am a complete beginner who resides in Africa's Western Hemisphere. My name is James, but you may reach out to me through the Twitter handle @churchangel. In the year 2018, I completed my high school diploma. Physics, chemistry, and biology are the topics that I find the most enjoyable. My current studies are taking place at the university level, intending to become a recognised professional in one of the topics I am interested in. My professional experience as a computer hardware technician is in the middle of the spectrum. My interest in learning more about computer technology and its upkeep grew when I received my SSCE qualification in 2018. I am fascinated by all things technological, and I take pleasure in contributing to the fascinating technological advancements that are taking place throughout the world today. In my spare time, I'd like to learn more about programming and aid others in resolving any technical issues they may be experiencing. 💞 *********🌹❤️ Thank you so much to everyone who has supported me thus far. ********💞 Currently, I am unable to express my appreciation for all of your assistance in appropriate words. You never cease to astonish me with your generosity. For me, this has turned into a haven of enjoyment. Thanks to colleagues like you, this has all been possible. You've been a great support to me. Everything you have done for me and my family has been greatly appreciated, and I will always be grateful to you.💕.


Indeed you are a science student...keep up the good work dear


Congratulations @jsalvage! You have completed the following achievement on the Hive blockchain and have been rewarded with new badge(s):

You got more than 700 replies.
Your next target is to reach 800 replies.

You can view your badges on your board and compare yourself to others in the Ranking
If you no longer want to receive notifications, reply to this comment with the word STOP

Check out the last post from @hivebuzz:

Hive Power Up Month - Feedback from February day 15
Support the HiveBuzz project. Vote for our proposal!

Thanks for your contribution to the STEMsocial community. Feel free to join us on discord to get to know the rest of us!

Please consider delegating to the @stemsocial account (85% of the curation rewards are returned).

You may also include @stemsocial as a beneficiary of the rewards of this post to get a stronger support. 


Thanks for this post, that I only read today. Last week was very busy, and I didn't have much time…

I have a few remarks. I hope that you don’t mind.

First, it was really nice to see that you mentioned the name of Priestley. However, it would be fair to also mention those of Bernoulli, Franklin, Robison and Cavendish. Their individual work that gave rise to what is known as the Coulomb law today.

By the way, whereas you discussed the magnitude of the Coulomb force very well, I would be more specific about its direction. When we estimate the force generated by an electric charge q1 on an electric charge q2, this force acts along the line drawn between the two charges (your second item). However, it is important to specify that its direction is always from q1 to q2. Then, the product of the two charges may flip this direction if the two charges have a different sign.

Finally, note that you may have given me some ideas for my future exam on electromagnetism with the copy machine story (which I didn't know) ;) Thanks!