- published: 30 Jul 2008
- views: 644308
Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Every material is influenced to some extent by a magnetic field. The most familiar effect is on permanent magnets, which have persistent magnetic moments caused by ferromagnetism. Most materials do not have permanent moments. Some are attracted to a magnetic field (paramagnetism); others are repulsed by a magnetic field (diamagnetism); others have a more complex relationship with an applied magnetic field (spin glass behavior and antiferromagnetism). Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. These include copper, aluminium, gases, and plastic. Pure oxygen exhibits magnetic properties when cooled to a liquid state.
The magnetic state (or magnetic phase) of a material depends on temperature and other variables such as pressure and the applied magnetic field. A material may exhibit more than one form of magnetism as these variables change.
An introduction to magnetism. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnets-magnetic/v/magnetism-2?utm_source=YT&utm;_medium=Desc&utm;_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/circuits-topic/circuits-with-capacitors/v/dielectrics-capacitors?utm_source=YT&utm;_medium=Desc&utm;_campaign=physics Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of tri...
What Really is Magnetism? : Documentary on the Science of Magnetism (Full Documentary). 2014 Education is a fundamental and importan part of today's society and is becoming increasingly more accessible and convenient online. The availability of information which is also entertaining helps us grow as people both individually and as a whole. Documentaries are the resource of choice of the new generation of students around the world. The documentary here along with the other documentaries on this channel relate to important times and people in history, historic...
The Conquest Continues over on Veritasium: http://bit.ly/VEMagnets_m THANK YOU to our amazing Subbable.com subscribers whose donations help keep MinutePhysics running! Calvin Kennell-Heiling Bendik Åshaug Holm Matthew Joseph Woolley TheTripleBstudios - http://www.youtube.com/TheTripleBstudios Mike Ledermueller Mark Liederbach - https://plus.google.com/112637595591573891595/posts Stephanie Ahlberg-Rosell - scoutingwithmeurr.wordpress.com K. Repking @lifeasasleeper How do magnets work? Why do they attract and repel at long distances? Is it magic? No... it's quantum mechanics, and a bit more, as we explain in this, the longest MinutePhysics video ever. MinutePhysics is on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics And twitter - @minutephysics Minute P...
You will learn about "Magnetism" in this video. "Introduction to Magnets". A magnet is an object or device that produces a magnetic field. It attracts objects made of nickel, iron and cobalt. A magnet has 2 poles, the North Pole and the South Pole. Opposite poles of 2 magnets always attract each other, i.e. the North pole of one magnet and the south pole of another magnet will always attract each other. Like poles of two magnets always repel each other. Two North Poles of magnets can never get attracted to each other, they will always repel one another. The Earth also behaves like a magnet. The North Pole of the Earth's magnet is in the geographical South and the south pole of the Earth's magnet is in the geographical North. Since opposite poles attract, a freely suspended magnet always ...
Unifying Gravity, Magnetism, Electricity & Dielectricity as ONE THING ONLY. Simplex enough for a child
What holds our world together? Electric Charges (Historical) - Polarization - Electric Force - Coulomb's Law This lecture is part of 8.02 Physics II: Electricity and Magnetism, as taught in Spring 2002 by Dr. Walter Lewin at MIT. This video was formerly hosted on the YouTube channel MIT OpenCourseWare. This version was downloaded from the Internet Archive, at https://archive.org/details/MIT8.02S02/. Attribution: MIT OpenCourseWare License: Creative Commons BY-NC-SA 3.0 US To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/us/. More information at http://ocw.mit.edu/terms/. This YouTube channel is independently operated. It is not affiliated with MIT, MIT OpenCourseWare, the Internet Archive, or Dr. Lewin, nor do they endorse any content on this chann...
I went through this subject in college inundated with equations and variables that pulled wool over my eyes. 30 years later, I understood the simple truth of this phenomenon after making Science Fair experiments for my kids: The Gauss Gun and the Shake Flashlight. Hence this video. This animated lecture-style presentation explains the empirical relationship between electricity and magnetism. See it and read it slowly and patiently before you get into equations in Physics class and clouding your mind with the complex works of the Physics masters. After all, they also started with the simple truth. Check our channel or the " i " symbol at top right of this video for related videos.
I edited this video for use in the classroom as an additional resource for students. Bill Nye does a great job explaining the concepts of magnetism with great visuals as well.
"Magnetism isn't Magnetism" Secrets of Magnetism: NO branch of Science can explain this. NONE IF YOU LIKE THESE VIDEOS, YOU CAN MAKE A NICE DONATION OF $2 OR $5 VIA PAYPAL TO EMAIL: kenw111@insightbb.com
The flow of electrons aboard the compass
Tweaking the needle towards hell
Where the confluent harmony turns to fuzz
By field lines of anguish that encircle the cells
The neurons and the nerves
Depression colour's it's canvas
Inside the thinking canals, like curves
Magnetic waves wrap it's was
Like a sun from a distant universe
That burns down my soul
I suffer dejection's eternal curse
At it rules the corridors of my nole
I'm a magnet to emptiness
And I can't change the polarity
Attracting the drakness
Beyond the boundaries of modicity
As a dynamo for uncontrolled hate
Both rotator and stator
Storing the emotions in a mental crate
Swallowed by depression's generator
I am the engine and the turbine
For atrabilious accidents
I am privation divine
Molded by an ignitable element
By stars from a violent universe
As they sleep withing my soul
Pulling down an infinite curse
Into the coridors of my nole
I'm a magnet to emptiness
And I can't change the polarity
Attracting the drakness
Beyond the boundaries of modicity
As a dynamo for uncontrolled hate
Both rotator and stator
Storing the emotions in a mental crate