• Definition: Electromagnetism is the phenomenon we observe when charge moves in a circuit.
• Effect: When there's an electric current, it creates a magnetic field.

🍎 Real-world example: Think of it like when you play music through a speaker. The speaker uses an electromagnet to vibrate and produce sound. It's electric current making a magnetic effect!

• Before the age of circuits and batteries, people noticed magnetic rocks (like lodestones).
• These rocks had an uncanny ability to point towards magnetic north.

🚤 Real-world example: Imagine you're an ancient sailor, navigating the vast oceans. You don’t have GPS or a compass. But hey, you’ve got a magnetic rock that always points you to the North! That's ancient navigation magic right there.