... coarse-adjusting rheostat 粗调变阻器 VA VOLTAGE ADJUSTING RHEOSTAT 电压调节电阻 eed-adjusting rheostat 转速调节变阻器 ...
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用定值电阻代替滑线变阻器，用分压器调节电压，可使二极管反向特性的测量更加方便。
Sliding resistance was replaced by the fixed value resistance, and potentiometer was used to adjust volt, it could make measurement of diode reverse characteristic more convenient.
通过调节电阻为较高的值，因此能够保持在SCR从击发直到AC电压达到其峰值的正方向。
By adjusting the resistor to a higher value, it is possible to keep the SCR from firing until the ac voltage has reached its peak value in the positive direction.
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