This real voltage is called the terminal voltage.

这个实际电压称为端电压。

Today we learned about batteries, and how terminal voltage results from the natural internal resistance of every real battery.

今天我们了解了电池，以及终端电压是如何由任何真实电池的自然内阻产生的。

And you calculate the terminal voltage by subtracting the voltage drop due to internal resistance from the supplied emf voltage, designated by a script E.

然后通过从传递的电动势电压中减去由于内部电阻引起的电压降来计算端电压，用字母 E 表示。

The internal resistance is typically much smaller than the resistance of any connected devices, so the terminal voltage is usually only a little bit less than the emf voltage.

内阻通常远小于所有连接器件的电阻，因此端电压通常只比电动势电压小一点点。