英语词汇“permanent magnet”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	permanent magnet
释义	permanent magnet noun A magnet that retains its magnetic properties in the absence of an inducing field or current.If this condition persists even in the absence of an external magnetic field, the material is a permanent magnet.... A permanent magnet may be represented precisely by an appropriate density of hypothetical magnetic charges on its two pole faces. The molecules were maintained under tension by the field gradient of two small permanent magnets placed above the sample.
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