Eddy Current Ring Pivot - 5K20.01 

- Push the magnet into the ring with the split, nothing happens.
- Push the magnet into the other ring, the rings will begin to pivot away from the magnet.
- Pull the magnet back towards you and the rings will pivot toward the magnet.

Location: Jacobs B 122 - Shelf 281

Eddy Current with a Strong Horseshoe Magnet – 5K20.10

- An aluminum plate is passed through a strong horseshoe magnet.

Location: Galileo F

Magnets in Eddy Tubes – 5K20.25

- Drop magnets simultaneously down the copper and PVC tube.
- The magnet falls through the PVC pipe with no resistance.
- The magnet falling through the copper tube takes much longer time to fall.

Location:Jacobs B122 - Shelf 276

Jumping Ring – 5K20.30

- Two aluminum rings are placed around the core of a coin. One ring has a gap.
- The apparatus is connected to a variac.
- With a ring in place, turn on the switch. The solid ring will jump.
- Replace with the ring that has a gap and it will not jump.
- Place a coil with bulb attached over the core and note the variation in bulb brightness with position of the coil.
- Cool the metal ring with liquid nitrogen and get really a great jump.

Location: Galileo F

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