POLARIZE YARD · SNAPLING
Electromagnets
Electromagnet Forge
Learn with Snapling, then use your clues in the adventure. Pause whenever you need time to read or think.
Speech bubbles tell the story. Music and sound effects are optional; use the player’s volume control.
Your Electromagnet Forge adventure
Train more: lesson transcript and free resources
Snapling — Electromagnets Electromagnet Forge
Hi!
I'm Snapling.
Welcome to Electromagnet Forge!
Will you help me investigate electromagnets?
The Grumblies have mixed up our clues.
Let's check the evidence!
Electric current in a coil produces a magnetic effect.
An iron core can strengthen the effect in an electromagnet model.
What produces the magnetic effect in this model?
- A. Only the coil's label
- B. Only the paint
- C. Current in the coil
The answer is C: Current in the coil
Electric current in a coil produces a magnetic effect.
An iron core can strengthen the effect in an electromagnet model.
That clue helps us make sense of this place.
Switching the current controls the magnetic effect,
making electromagnets useful for some lifting and releasing tasks.
Real devices vary.
When does the model lift iron?
- A. With current off
- B. With current on
- C. With the source absent
The answer is B: With current on
Our digital low-voltage crane model attracts iron with current on
and releases it when switched off.
This is a scaffolded model, not instructions to build a powered device.
Hmm...
how does that connect to our first clue?
Our digital low-voltage crane model attracts iron with current on
and releases it when switched off.
This is a scaffolded model, not instructions to build a powered device.
Why is switching useful for a crane?
- A. It can control pickup and release
- B. It makes every material magnetic
- C. It removes all load limits
The answer is A: It can control pickup and release
Switching the current controls the magnetic effect,
making electromagnets useful for some lifting and releasing tasks.
Real devices vary.
Nice investigating!
You've been following the evidence.
Let's bring our clues together before the adventure.
Electric current in a coil produces a magnetic effect.
Switching the current controls the magnetic effect,
making electromagnets useful for some lifting and releasing tasks.
Our digital low-voltage crane model attracts iron with current on
and releases it when switched off.
You're ready to explore Electromagnet Forge with me!
Choose TRAIN MORE if you'd like another look at the clues.
Choose START ADVENTURE when you're ready.
I'll be right here!
Or choose BACK TO MAP.
Every stop is open to explore!
Explore any of the six lessons
Every destination is open. No account, purchase, previous lesson, or completed video is required.