Lorentz' Law Demonstrator
Show the Force Exerted on a Charged Particles Moving in a Magnetic Field
Here's a convenient item with a special circular solution trough that makes it possible to study the direction of flow, giving a visual demonstration of Lorentz' right-hand rule. Using the built-in electrode attachment panel, you apply a low voltage to the apparatus and gradually increase the voltage. This causes current to flow through an electrolytic solution in the trough (sodium hydroxide 5-10%) providing the moving charged particles. When small magnets are placed on the electrode attachment panel and under the trough itself, the force on the charged particles cause the solution to flow. Because the trough and its base are made of clear acrylic, you can mount the apparatus on an overhead projector. Includes trough and base; two pairs of electrodes for applying voltage (one pair can be kept as a spare); four ferrite magnets with indicated polarities; two floating acrylic disks that you place in the trough to indicate the direction of flow and instructions. Requires power supply, sold separately. Size: the unit is a compact 12 × 13 × 5cm.
羅倫茲定律裝置
這是利用一種圓形特別溶液槽的簡單且方便的裝置，經由此裝置
，可以很容易的觀察電流的方向及學習羅倫茲右手定則。利用內
建的電極板，你可以提供一低電壓，再慢慢提高電壓，因此產生
電流流經槽裡的電解溶液（ 5 - 10 ％ 的氫氧化鈉）而產生移動的
電荷。拿一小塊磁鐵通過電解溶液槽的中間，產生在電荷上的力
使溶液流動。因此圓形槽及底下的基座由乾淨的壓克力製成，因
此你可以將放在他投影機下方。包含槽及底座，兩副提供電壓之
電極（一副為備用），四個有標明兩極的磁鐵，兩個可放在溶液
裡指示流動方向的壓克力板，說明書。需要電源供應器，另賣。
大小：13公分長，12公分寬，5公分高。