Thomson found that the electrical resistance of some materials changes when a magnetic field is applied to them. This effect can be used to read back what has been recorded.
他发现有些材料在受到磁场作用时会改变其电阻性，这种效应也可被应用于回读被记录的数据。
The galvanometer is placed on a leaf off the plant, and it records any changes in the electrical field of the leaf.
把检流检置于已从植物上脱落的叶片上，它就可以记录叶片的电场中的任何电荷。
Water tree may be formed in the insulation due to physicochemical changes caused by the combined effect of water and intense electrical field.
电缆运行过程中，在水分和电场的共同作用下发生物理化学变化，形成水树枝。
Water tree may be formed in the insulation due to physicochemical changes caused by the combined effect of water and intense electrical field.
电缆运行过程中，在水分和电场的共同作用下发生物理化学变化，形成水树枝。
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