Alex Peek blog

Thursday, December 31, 2020

Fundamentals of electromagnetism

This post is a list of fundamental principles of electromagnetism. There are 16 principles listed below.

Charged particles have an electric field in all directions (positive or negative)
Particles of the opposite charge attract eachother
Particles of the same charge repel eachother
Electrons have a negative charge
Charged particles have a magnetic field (north and south orientation)
Opposite magnetic poles attract eachother
Magnets have coordinated particles pointing in the same magnetic field
Electrons moving in a wire is an electric current in the opposite direction
Electric current is caused by a charge imbalance in a circuit or change in an magnetic field
An electric current creates a magnetic field curling around it (near field)
An accelerating electric field creates a perpendicular magnetic field (far field)
An accelerating magnetic field creates a perpendicular electric field (far field)
Electric and magnetic fields propagate together through space (far field)
Electromagnetic waves travel at the speed of light
Electromagnetic waves vary in frequency
Visible light is an electromagnetic wave in a specific frequency range