OK. And I can measure the charge separation with this voltmeter here.

好的。我可以在这里用这个电压表测电荷。

To measure voltage, you'd just need a tool known as a voltmeter.

要测电压，您只需要一个工具 称为电压表。

Finally, we saw how to measure voltage and current in a real circuit using voltmeters and ammeters.

最后，我们了解了如何使用电压表和电流表测实际电路中的电压和电流。

So, what you do is give the voltmeter a resistance that's so high that it's considered infinite, relative to the rest of the circuit.

所以，你正在做的是给电压表一个如此高的电阻，相对于电路的其余部，认为是无限的。

And if a voltmeter is attached in series, you're not going to see any current flowing, because the resistance is so large!

如果串联一个电压表，您将看不到更多电流流动，因为电阻太大了！

No solution is perfect, but you can get a pretty accurate reading by attaching the voltmeter on either side of the device that you want to measure.

没有完美的解决方案，但您可以通过将电压表连接到要测的设备的任一侧来获得相当准确的读数。

With an " infinite" resistance, the same voltage is read across both the voltmeter and the device you're measuring, and a tiny amount of current ends up running through the voltmeter.

使用“无限”电阻，在电压表和您正在测的设备上读取相同的电压，并且极少的电流流过电压表。

Going from  one extreme in technology to the opposite, the crews used car batteries and voltmeters to take  measurements of the conductor's resistance between tap points to precisely identify the location  of the fault within Mr. McMahon's neighborhood.

从技术的一个极端转向相反的技术，工作人员使用汽车电池和电压表测接点之间的导体电阻， 以精确确定麦克马洪先生附近的故障位置。