我们闭合线圈，并试着算出线圈内部的电压。

Let's close the loop and let's try to figure out the voltage inside this loop.

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触接点的开启与闭合产生感应电压。

Opening and closing of the contact points creates induced voltage.

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尽管可能会闭合多条路径，但实际应用中，只有在DC测试中才会用到，例如对多个DUT施加连续的偏置电压。

Although it is possible to close multiple paths, this is practical only in DC testing, for example, to apply continuous bias voltage to a number of DUTs.

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