Lesson 4 of 6 · Magnetism
Experiment⭐ 30 XP⚡ Spark LabElectromagnetic Induction and Generators
Magnetism.
🎯 Your mission
Set it up. Test it. Be amazed.
⚡ The twist
Speed isn't the same as force. Don't mix them up.
Mind = Blown
🔥 A bolt of lightning is 5 times hotter than the surface of the sun.
Make a hypothesis first
Guess: where does the energy go?
What You'll Learn
Move a conductor through a magnetic field, or change the field through a coil, and a potential difference is induced. Faster motion, more turns and a stronger field all increase it. Every mains power station generates electricity this way, whatever the fuel.
Key Words
Tap a word to see its definition.
Materials Needed
- coil of wire
- bar magnet
- sensitive galvanometer
- leads
Safety First
- Keep magnets away from the galvanometer's own movement when not in use.
Steps
Read the explanation above and note the two key terms before you start.
Move a bar magnet in and out of a coil connected to a sensitive galvanometer. Record the deflection for slow and fast motion, reversed poles, and a stationary magnet inside the coil.
Record what actually happened, including anything that did not match what you expected.
Write a conclusion that answers the question this lesson opened with, and state your uncertainty.
Check Your Understanding
Question 1
1 of 2No potential difference is induced when the magnet is:
Where you see this in real life
This is why airplanes can fly and why rockets reach space.
Stretch Challenge
Try this in real life this week.
This week, find one thing in your house that turns one kind of energy into another.
For the dinner table
“Show me something at home that uses this kind of energy.”
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Electromagnetic Induction and Generators
Set it up. Test it. Be amazed.
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