电压表的引线则按已知的距离放置。

The voltmeter leads are placed a known distance apart.

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如果我们把电压表的输入引线反向，就得到了如图3 - 13b的情况。

If the input leads of the voltmeter are reversed, we have the situation shown in Figure 3-13b.

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如果我们把电压表的输入引线反向，就得到了如图3 - 13b的情况。

If the input leads of the voltmeter are reversed, we have the situation shown in Figure 3-13b.

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