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Grass seeds are polar and line up with electric field lines. ASU copyright The seeds are sprinkled on a glass plate supported by rubber 'feet' on an overhead projector. ASU copyright A patch cable with banana plug ends is connected to ground and the other end of the wire to one of the contacts. The other contact is connected to the Van de Graaff generator. The contacts sit on various tin foil shapes attached to the glass. ASU copyright A chain is attached to the top of the VDG with electricians tape. ASU copyright A paper chute facilitates removing the grass seed. A small mallet is used to tap the glass to align the seeds. The shaker bottle contains grass seed. ASU copyright Lead contacts sit on various tin foil shapes. Two circles are shown here. They can be charged the same or different by moving the metal chain on the contacts. The small mallet is used to tap the glass. ASU copyright
ASU copyright
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PHYSICS |
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| 5B10.27 | Grass seeds - electric fields | Rating: |
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Captions and Credits to the left in the sidebar. |
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Description: Grass seeds are polar and line up with the electric field lines. |
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| Room:PS F175 | Location: 22-3 | Sublocation: | ||
| Type: demo | Date Added: | Condition: | ||
| Quantity:1 | Complete: | Last updated: 8/26/2005 | ||
| Purpose: Show electric field lines. | ||||
| Safety Issues: Disclaimer (Warning - work in progress - may be incomplete) | ||||
| Equipment Issues: | ||||
| Parts: overhead projector 9, VDG 22-2, red box 22-3 | ||||
| Copyright © 2000 | Instructions: | |||
| Arizona Board of Regents | Notes: | |||
| Webmaster Privacy | ||||
| Accessibility | References: | |||
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| 1A0 | MEASUREMENT |
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| 1A10 | Basic Units |
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| 1A10.10 | Basic units set-Video | Video Encyclopedia: Show a clock with a second sweep, meter & yard sticks, and kilogram and pound mass |
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| 1A10.35 | Meter stick - 4 sided | Graduated in meters, decimeters, centimeters, & millimeters |
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| 1A10.50 | Liter Cube/set |
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| 1A10.510 | Meter Cube | Meter cube frame, stored dismantled |
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| 1A10.520 | Volume Perception Paradox | One liter of colored water is poured from a sphere to cylinder. The sphere seems smaller but is of equal volume. |
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| 1A10.60 | Avogadro's Number box | Black 22.4 liter cube |
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| 1A20 | Error and Accuracy |
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| 1A20.10 | Gaussian curve - Video | Video Encyclopedia: A commercial device for the overhead projector where ball bearings roll through an array of nails into parallel chutes. |
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| 1A20.25A | Dice - ordinary |
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| 1A20.25B | Dice - overhead |
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| 1A20.25C | Dice - polyhedral |
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| 1A20.25D | Dice - large foam |
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| 1A30 | Coordinate System |
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| 1A30.10A | XYZ Coordinate axes | Long arrow shafts with label attachments |
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| 1A30.10B | XYZ Coordinate axes | Zometool version |
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| 1A30.10C | XYZ Coordinate axes | Medium arrow shafts with dull broadheads |
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PS H356
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| 1A30.30 | Polar Coordinates | A semi circle is rotated about an axis to demonstrate why integration over theta is from zero to 180 degrees. |
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| 1A30.30 | Polar Coordinates |
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| 1A30.40A | Chalkboard Globe - Large |
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| 1A30.40B | Chalkboard Globe - Small |
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| 1A40 | Vectors |
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| 1A40.001 | Vector models, Magnetic Field model, Electric Field model, Electromagnetic Field model | Three cardboard vector models. 1) A uniform vector field represented by 9 arrows in 3 by 3 array. 2)Single vector represent by an arrow perpendicular to cardboard. 3) Same as 2) except a circle is drawn around the arrow to represent the curl of the vector |
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| 1A40.10 | Vector components (3D)-Video | Video Encyclopedia : Metal arrows define a three dimensional coordinate system. An arbitrary vector is viewed in three planes. |
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Records 1 to 25 of 1978
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