It changes between a maximum and minimum peak voltage in order to generate the alternating current.

它在最大和最小峰值电压之间变化以产生交流电。

When the voltage is at peak voltage, the current through the resistor will also be at peak current.

当电压处于峰值电压时，通过电阻器的电流也将处于峰值电流。

This means that, when the current is 0, there's peak voltage, and when current is at its peak and unchanging, the voltage is 0.

这意味着，当电流为0时，有峰值电压，当电流处于峰值且不变时，电压为0。

Now, this same derivation works for alternating voltage, as well, with the RMS value of voltage being equal to the peak voltage divided by the square root of 2.

现在，同样的推导也适用于交流电压，电压的 RMS 值等于峰值电压除以 2 的平方根。