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什么是电流的热效应？它有何利弊？
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什么是电流的热效应？它有何利弊？
时间：2023-03-06 15:47
关键词：
泵站操作工考试
水利部质量检测员考试
有线电视机线员中级
有线电视机线员
电工学、电子学
答案解析
<p> 当电流通过导体时，由于电阻的存在，会引起导体发热，这种现象称为电流的热效应。<br> 利用电流的热效应，可以制成各种加热电器，在生产和生活中得到了广泛的应用，这是电流热效应有利的一面。但是在很多情况下，电流的热效应是有害的，如变压器和电动机在运行中，由于电流的热效应会使其发热，如果不对通过的电流加以限制，则设备将会因其温升超过允许的限度而损坏，同时对系统的安全也是一种不利因素。</p>
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