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

好的。我可以在这里用这个测荷分离。

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

要测，您只需要一个工具 称。

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和流测实际路中的和流。

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，你正在做的是给一个如此高的阻，相对于路的其余部分，它被认是无限的。

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，您将看不到更多流流动，因阻太大了！

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”阻，在和您正在测的设备上读取相同的，并且极少的流流过。

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，工作人员使用汽车池和测分接点之间的导体阻， 以精确确定麦克马洪先生附近的故障位置。