We present a simple demonstration of the skin effect by observing the current distribution in a wide rectangular strip conductor driven at frequencies in the 0.25–5 kHz range. We measure the amplitude and phase of the current distribution as a function of the transverse position and find that they agree well with numerical simulations: The current hugs the edges of the strip conductor with a significant variation in phase across the width. The experimental setup is simple, uses standard undergraduate physics instructional laboratory equipment, and is easy to implement as a short in-class demonstration. Our study is motivated by modeling ac magnetic near fields in the vicinity of a rectangular trace on an atom chip.

中文翻译：

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使用拾音线圈演示横向交流趋肤效应

我们通过观察以 0.25–5 kHz 范围内的频率驱动的宽矩形带状导体中的电流分布，来展示趋肤效应的简单演示。我们测量了作为横向位置函数的电流分布的幅度和相位，发现它们与数值模拟非常吻合：电流紧贴带状导体的边缘，其宽度上的相位变化很大。实验设置简单，使用标准的本科物理教学实验室设备，并且易于作为简短的课堂演示实施。我们的研究是通过模拟原子芯片上矩形轨迹附近的交流磁场近场来激发的。