However, the speed of the rotor rotation speed did not change the high magnetic field, or magnetic line of force will not be able to cut the copper.
不过此转子转动速度没有磁场变换之速度高，否则磁力线将不能为铜棒所切割。
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.
将一磁铁放在盒下并将它放在一投影机下面——你即可看到铁粉随著磁力线的分布而移动。
The rotation will last for ever if the permanent magnetic ring and the magnetic force line of the permanent magnet SN exist for ever.
只要永磁环和永磁体sn的磁力线永久存在，旋转也将始终存在。
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