Some vector math, but explained from the ground up.
Lenz’s law is the rebellious teenager of physics. It says: When you try to create a current with a magnet, the new current will fight back. It creates its own magnetic field to oppose whatever you are doing.
By the 1860s, the Scottish physicist James Clerk Maxwell did something extraordinary. He took all the known laws of electricity and magnetism and distilled them into just . And with those four equations, he made a stunning prediction: electromagnetic waves exist, and they travel at the speed of light.
– You can often find used copies of titles like Electronics For Dummies (which covers basic EM) or Physics II For Dummies (covers electromagnetism) for very cheap on sites like AbeBooks, eBay, or ThriftBooks. Some libraries also have ebook versions through apps like Libby or Hoopla.
Electromagnetism has numerous practical applications in various fields:
A temporary magnet created by wrapping a wire coil around an iron core and running a current through it. Turn off the current, and the magnetism vanishes.
Electromagnetism is not just theory. It powers the technology we use daily.
