This section details how to make surface and volume resistivity measurements with these test fixtures, as well as the AlternatingPolarity and Alternating Voltage techniques for measuring resistivity.
The electric current supplied to the coils in the guideway walls is constantly alternating to change the polarity of the magnetized coils.
供给导轨槽内线圈的电流交互变化着电磁线圈的极性。
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Furthermore, the deposition rate increases per unit of welding current by decreasing wire diameter, and adjustment of the penetration depth is enabled by alternating current wave form and polarity.