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Why do physical movements of cables create hundreds of picoamps of current?

问题:

Why do physical movements of cables create hundreds of picoamps of current?

答案:

There are several ways that cables can generate error currents. First, the cable materials can generate currents similar to the way a piezo-electric crystal can generate charge. Second, friction between the concentric layers of a cable (coax) can generate static charge that flows along the conductive surfaces. These currents could be on the order of 100pA.

此常见问题适用于:

产品系列: Keithley 2182A 型纳伏表

产品:

常见问题 ID 70526

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