Physics Demonstrations at Cal Poly Pomona
Demo Index:
Pira Index:
Title:
Description:
Electric field patterns are shown w/several pole arrangements.
Equipment:
1. Large square tank w/ set of weight hangers, rods, & leads
2. Bag of model railroad flock
3. Shell dielectric oil
3. Dirod static generator
4. Overhead projector
Procedure:
1. Put the tank on the OHP and pour 1/4" of oil into the bottom of the tank.
2. Connect the dirod to a pair of electrodes: weight hangers (point-point), 2 rods (plane-plane), or some other combination. Place the electrodes into the tank. Sprinkle flocking into the oil & stir to disperse somewhat evenly.
3. Crank the dirod and watch the flocking line up in a pattern typical to the electrodes used.
4. Stop charging and give it time to equalize before trying another pair.
