A step-down transformer has a turns ratio less than 1 . 降压变压器的匝数比小于1。
Only transformer coupling can contribute to the voltage gain of an amplifier by virtue of a stepup turns ratio . 只有放大器耦合方能通过开压匝数比提高变压器电压增益。
Therefore, the magnetomotive force in the air gap is essentially proportional to the primary ampereturns squared . 所以，气隙中的磁动势实际上与初级安匝数的平方成正比。
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 fluctuating magnetic field cutting across the turns of 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的次级线圈的线匝或线环时，会在这些线环中引起电压。
A step - down transformer has a turns ratio less than 1 降压变压器的匝数比小于1 。
Or ending well , but i find the middle intriguing .结束得也不匝样但中间这段挺难忘的
Hello ? - so i know our dates aren ' t beginning -喂？ -我知道我们的约会开始得不匝样
Hello ? - so i know our dates aren ' t beginning . . 喂？ -我知道我们的约会开始得不匝样. .
- hello ? - so i know our dates aren ' t beginning . . -喂？ -我知道我们的约会开始得不匝样. .
