Lenz's Law - Visible Motion | Physics Demonstrations

Coffee Can, L-Bracket, Magnetic Ball, Nonmagentic Ball

Concept Overview:

1. Lenz's Law

2. Eddy Currents

Lecturer Procedure

Step(s) to Follow	Expected Result
1. Place L-bracket in coffee can and lean against bench. 2. Hold nonmagnetic ball at top of bracket and release.	Ball will quickly roll into the can.
1. Repeat steps above with magnetic ball	Ball will slowly roll into the can due to the presence of Eddy Currents caused by Lenz's Law

Step(s) to Follow

Expected Result

1. Place L-bracket in coffee can and lean against bench.

2. Hold nonmagnetic ball at top of bracket and release.

Ball will quickly roll into the can.

1. Repeat steps above with magnetic ball

Ball will slowly roll into the can due to the presence of Eddy Currents caused by Lenz's Law

In Action:

Ball rolling down L-bracket into can