1开发者_JS百科、极性的判别将万用表置于R×100档或R×1k档,两表笔分别接二极管的两个电极,测出一个结果后,对调两表笔,再测出一个结果。两次测量的结果中,有一次测量出的阻值较大(为反向电阻),一[详细]
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