The Science of Everything Podcast Episode 61: Magnetism
Apr 27, 2014
Dive into the fascinating world of magnetism! Explore how magnets work, from magnetic poles to the mysterious absence of monopoles. Uncover the quantum origins of magnetism with electron spin and see how these concepts lead to real-world applications. Learn about ferromagnets, electromagnets, and the interplay between electricity and magnetism. Discover the magic behind generators and motors, and get a glimpse of Maxwell's equations that govern it all. Prepare to be amazed by the forces that shape our universe!
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Magnetic Fields And Field Lines
- A magnetic field is a vector region of space that exerts forces and is measured in Teslas.
- Magnetic field lines flow from north to south and show the direction a north pole would align.
Magnets Are Always Dipoles
- Magnets are always dipoles with a north and south pole together; cutting a magnet yields two smaller dipoles.
- No magnetic monopoles have been observed in ordinary matter so magnetic poles always come paired.
Lorentz Force And Perpendicularity
- The Lorentz force acts only on moving charges and is perpendicular to both velocity and magnetic field.
- This perpendicularity makes charged particles move in circular paths under constant magnetic fields.