When the core is displaced, the inductive reactance of the secondary coil is unbalanced . 当铁芯移动时，次线圈的感抗就不平衡。
A meter needle attached to the coil enables the position of the coil to be observed . 固定在线圈上的表针使人们能观察到线圈的位置。
The number of turns of wire in the secondary coil is the same as the number of turns in the primary . 次级线圈的圈数和初线线圈圈数一样。
The electromagnets would require only an initial power input to start the current in their coils . 这种电磁铁只要馈入一个初始功率就能起动线圈里的电流。
A pair of capacitive rings attached to the respective pole piece is used to detect movement of the coil . 两个分别附在各自极靴上的电容环被用来探测线圈的运动。
These currents become the source of new electromagnetic waves which can be detected by suitable pickup coils . 这些电流成为能被合适的拾波线圈检测的新的电磁波源。
The common principle is the use of the induction of an electromotive force by the variation of the magnetic flux through a coil . 一般原理均是使用通过线圈的磁通量变化感应的电动势。
The factor which is most detrimental to the formation of the null voltage is the capacitive coupling between the primary and secondary coils . 对形成零电压最有害的因素是初线圈和次级线圈之间的电容耦合。
The fluctuating mangnetic field cutting across the turns or loops of wire of the secondary coil sets up an electrical pressure or voltage in these loops . 起伏变化的磁场横向切割着次极线圈的线匝和线环时，会在这些线环中引起电压。
The block becomes magnetic when the current is switched on 通电时线圈即具磁性
