About this video
TED-Ed explains the science of magnetism and why it puzzled scientists for a long time. You'll learn how magnets are used in things like MRI machines and hard drives. It's a smart look at invisible forces.
🧠 Quiz & Trivia
Test your knowledge after watching!
Q1 What tiny particles have magnetic fields?
Answer: Electrons and protons
Q2 What medical machine uses magnetism?
Answer: MRI machine
Q3 In what decade did physicists still have big questions about magnetism?
Answer: The 1920s
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