How to Use This Simulation
Step 1: Press Play to start the magnet oscillating through the coil.
Step 2: Watch the galvanometer needle — it shows the induced current direction and strength.
Step 3: Adjust coil turns, magnet strength, and motion speed to see how each affects the current.
Keyboard: Press Space to play/pause, R to reset.
Data Journal — Record & Analyze Your Experiments
| # | Coil Turns | Magnet Str. | Speed | Peak mA | Peak mV | Observation |
|---|
PREDICT
If you double the number of coil turns, what happens to the induced current? What about doubling the magnet speed?
OBSERVE
Try 10 turns at speed 5, then 20 turns at speed 5. Record the peak current each time. Now try 10 turns at speed 10. What pattern do you see?
EXPLAIN
Using the words magnetic flux, change, and induced current, explain why a stationary magnet produces zero current but a moving one does not.
Key Concepts
- Electromagnetic induction: A changing magnetic field through a coil creates (induces) an electric current.
- Faraday's Law: Induced voltage is proportional to the NUMBER of coil turns and the RATE of change of magnetic flux.
- Motion is required: A stationary magnet produces ZERO current — the magnetic field must be CHANGING.
- More coil turns = more voltage: Doubling the turns doubles the induced voltage.
- Faster motion = more current: Moving the magnet faster increases the rate of flux change.
- Current direction reverses: When the magnet reverses direction, the induced current reverses too.