200 years later-Celebrating Faraday Motor | Laboratory News

2021-11-13 07:18:31 By : Ms. Shannon Cao

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This year, more than 200 years ago, Michael Faraday discovered that electric motors paved the way for power generation worldwide. Faraday's discovery is still at the core of our modern technological world. It directly led to field theory, which is now considered one of the most surprising theories, second only to Einstein's theory of relativity.

Here, the Royal Society gives a brief overview of one of the most influential scientists of all time.

The scientific discoveries of the self-taught scientist Michael Faraday in his laboratory in the basement of the Royal Society have shaped the world, changed our understanding of the laws of physics, and are still vital to our modern technological world.

The most important thing is that this year, more than 200 years ago, in September 1821, the world's first electric motor was developed.

Faraday's electric motor represents the early results of his life study of electromagnetism. This was the first time that electricity became practical and widely used, and it was the basis for Faraday's subsequent development of generators or generators.

Electricity, mass communication, mobile travel, computers, mobile phones-without Fara's invention two centuries ago, all of these would not have been possible today. 

This is the first time that electricity has been made possible and paved the way for its widespread use worldwide. 

The motor is an early result of Faraday's lifelong experiment in electromagnetics. After generating continuous mechanical motion from magnetism and electricity (motor), he starts to work, generating electricity from mechanical motion and magnetic force (generator or generator). This discovery will change our world, ultimately promote the "Second Industrial Revolution", and make possible other life-changing inventions such as the light bulb.

The motor envisioned by Faraday remains at the core of our modern technological world.

Everything from laptops to electric guitars to satellites has motors. The electricity we use all over the world relies on generators, which is another invention of Faraday and comes directly from his electric motors. If you look around your home-in the kitchen alone you have washing machines, dishwashers, microwaves, blenders, etc., all of which rely on motors-you will always find something that is still based on Faraday's work. 

It directly leads to field theory, which is considered to be one of the most surprising theories, second only to Einstein's theory of relativity.

When developing the motor, Faraday proposed the concept of line of force, which was mathematicalized by James Clark Maxwell. Maxwell's work laid the foundation for radio waves and our understanding of modern physics, including Einstein's work on special relativity and the development of quantum theory.

Albert Einstein put a picture of Faraday on the wall of his study. The physicist Ernest Rutherford, known as the father of nuclear physics, said: "When we consider the scale and scope of his discoveries and their impact on the progress of science and industry, there is no honor to use. Commemorate Faraday, one of the greatest scientific discoverers of all time."

Faraday is often included in any evaluation of the most influential scientist of all time.

In addition to motors and generators, he also  

He exemplified that science is for everyone.

Faraday received relatively little formal education, and when he first started attending Humphry Davy's lectures at the Royal Academy, he was hired as a binder to learn by reading the books he was binding. His scientific knowledge and skills were self-taught, but he became the greatest scientist of his generation, which shows that everyone can make their mark in science, regardless of their background.

Although Faraday himself has almost no formal education, he himself undertakes to educate the public in science. He was humble and humble, rejected the chairmanship of the Royal Society, and would never accept knighthood. In 1825, Faraday launched the world-renowned Royal Society Christmas Lecture. At that time, children received very little formal education, and it is now broadcast on the BBC every year.

As important today as it was then, Faraday is concerned with society’s fascination with tricks, especially in the form of spiritualism. In a famous demonstration by Ri, Faraday proved to the public that the "turning over the table" during the surrender was not due to spiritual activity, but the inadvertent pressure of the participants' own hands. 

How did the motor come

In 1820, Hans Christian Ørsted announced his discovery that when an electric current passes through a wire, a magnetic field is generated around the wire. André-Marie Ampère went on to show that the magnetic force is obviously circular, but actually produces a cylindrical magnetic force around the wire. Such a circular force has never been observed before. 

The self-taught British scientist Michael Faraday (1791 – 1867) was the first to understand what these discoveries meant. If the magnetic pole can be isolated, it should continuously move in a circular motion around the current-carrying wire. In 1821, Faraday began to try to understand the work of Ørsted and Ampère, and designed his own experiments using a small mercury bath. This device that converts electrical energy into mechanical energy is the first electric motor.

The characteristic of the motor is a hard wire, which is suspended in a glass container, and a bar magnet is fixed at the bottom of the glass container. The glass container will then be partially filled with mercury (a metal that is liquid at room temperature and is an excellent conductor). Faraday connected his device to a battery, which sends current through wires, creating a magnetic field around it. This magnetic field interacts with the magnetic field around the magnet, causing the wire to rotate clockwise.

Further reading (if needed): 

Jim Al-Khalili’s summary of Faraday’s work for the Royal Society, including electric motors