- A horseshoe magnet hangs on two thin ropes.
- If you deflect the magnet, it can vibrate without rubbing against the coil.
- Due to the air friction, the magnet is slowed down a bit, but hardly noticeable.
- If the ends of the coil are connected, you can observe the following:
- The magnet comes to rest much faster.
1. Due to its movement, the magnet induces a current in the coil.
2. Since the circuit is closed, the electrons can flow and generate another magnetic field.
3. This generated magnetic field is responsible for the deceleration.
- To better observe this magnetic field, we look inside the coil during this process.
- The magnetic field (clarified with force field lines) changes its direction, depending on the movement of the magnet.
- Each time, the magnetic field slowes down the movement of the magnet.
- This is stated by Lenz's Law.
- Translation: "The direction of the current induced is such, that the magnetic field created opposes the initial magnetic field."
- The cause is the movement of the magnet.
Consequently, the magnetic field acts against this movement.
- The movement is slowed down!