Lenz Law

Lenz's law you can see — introduce a magnet to a closed loop and the induced current opposes the change, while the open loop does nothing.

How it works

1. Bring a magnet toward the closed loop
2. An induced current flows to oppose the change
3. The open loop shows no induced current

What students learn

• State Lenz's law (induced current opposes change)
• Compare open vs closed circuits
• Link to conservation of energy

Try these experiments

1. Move the magnet near each loop and compare
2. Reverse the magnet and observe opposition
3. Discuss why energy must be conserved

Curriculum fit

In the box

• One open loop and one closed loop
• Mounted on a central pivot

Pairs well with

Lazy Tube DoubleMAE-117Eddy Current Disc TypeMAE-118