# Title Image Description Video
1 Resistance Model

Resistance Characteristics

Ball bearings are rolled down an inclined bed of nail to simulate current flow in a wire.

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Video 2

2 Wire Coil in LN2

Resistivity and Temperature

Set up as shown. Place the coil into the LN2. Watch the light bulb get brighter as the coil cools.

Video 1

Video 2

3 Conduction in Glass

Resistivity and Temperature

A light bulb is smashed with a mallet and the filament is cut off. Then, the glass stem is heated with a blow torch.

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Video 2

4 Jacob's Ladder

Conduction in Gases

This is a step up transformer. CAUTION: LETHAL VOLTAGE

Turn on the power and the discharge will travel up the wires. The distance between the wires is the critical adjustment. The wires should not be moving.

This does not work will on humid days. Unplug after use so that students don't inadvertently play with it.

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Video 2

5 RLC Resonance

RLC Circuits - AC

The light bulb in a RLC circuit glows when the inductor core is moved through resonance.

Also, RLC resonance shown on an oscilloscope.