The electromagnetic induction device is an electromagnetic disk of a metallic film of a flat plate to be arranged on the electromagneticcoil;
电磁感应装置为平板金属膜的电磁盘，设在电磁线圈的上面；
2
The advantages lie in that the electromagneticcoil turns and turn-to-turn distance can be randomly regulated to generate frequency changes and magnetic field distribution changes.
可任意调节电磁线圈匝数，匝间距离，产 生频率变化磁场分布变化。
3
They then sent a current through it so that the coil was magnetised in a way which mimicked Earth's electromagnetic field.