What quantity did you change?
Labs / Physics
Faraday Induction
Grab the bar magnet and push it in and out of the coil. A moving magnet changes the magnetic flux threading the loops, and Faraday's law turns that change into an induced current — watch the galvanometer swing and the coil glow. The faster you move, and the more turns you add, the bigger the current.
Labs / Physics / Faraday Induction
Faraday Induction
Grab the bar magnet and push it in and out of the coil. A moving magnet changes the magnetic flux threading the loops, and Faraday's law turns that change into an induced current — watch the galvanometer swing and the coil glow. The faster you move, and the more turns you add, the bigger the current.
Why it matters
Why explore this?
Physics explains how changes in forces, energy, motion, and matter produce results we can measure. This model lets you test one part of that relationship at a time.
Explore
Try the model
Φ 0.0 mWb|v| 0 cm/sEMF 0 mVI 0.0 mA 0
Investigate
Questions to test
Predict first, try it in the model, then use what you observe to answer.
What to try
- Hold the magnet perfectly still inside the coil. Why does the galvanometer read zero even though the magnet is right there?
- Move the magnet in slowly, then whip it in fast. What is it about the motion — not the magnet — that sets the size of the EMF?
- Push the magnet in versus pulling it out. Why does the induced current reverse direction?
- Flip the poles and repeat a push. How does swapping N and S change what the galvanometer does?
- Crank the coil turns from 1 to 40 at the same speed. Does doubling the turns really double the induced EMF?
Explain
Make sense of what happened
Name the quantity you changed, the quantity that responded, and the physical rule connecting them. Use a readout or visible change as evidence.
Check
Before you leave
What measurable result changed?
Which physical idea connects them?
If you can answer all three using evidence from the model, you understand the main idea. If not, return to Explore and change one setting at a time.