7-3 磁力線裝置

說明：

Magnetic Field Projectual

Conduct Experiments Without the Mess of Loose Fillings

Loose iron fillings and magnets are the typical tools for studying magnetism. But for lectures and demonstrations, our apparatus gives you an easy way to do experiments that everyone can see, without the mass of loose filings. The Magnetic Field Projectual is a sturdy, transparent acrylic case that holds iron filings in a special viscous fluid. You shake the unit to distribute the filing evenly, with the help of a glass rod that's sealed inside. Place any magnet under the unit and set it on an overhead projector-and you will see the filings moving to line up along the lines of magnetic force. Size: 25cm × 21cm × 2cm thick.

　

磁力線裝置

       使用鐵粉及磁鐵是很典型學習電磁學的方法。但是在講台上或

          是示範上，我們的裝置可以提供一種簡單的實驗讓大家都可以

          看到，而不需要其它的東西。磁場投射盒是一堅固、透明的壓

          克力板，裡面有鐵粉在一種特別的纖維性液體裡。裡面有玻璃

          棒可幫助你在搖晃時使鐵粉均勻的散佈。將一磁鐵放在盒下並

          將它放在一投影機下面----你即可看到鐵粉隨著磁力線的分佈而

          移動。大小：25公分長，21公分寬，2公分厚。。