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GCSE科学/电学多项选择练习题8 答案1
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来自维基文库，一个开放世界的开放书籍
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GCSE科学
抱歉，这是错误的答案。
根据欧姆定律
R=V/I
但V/I也是图中线上面的
斜率
（或
梯度
）。因此对于一个恒定的斜率，我们必须有一个恒定的电阻。
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书籍：GCSE科学
华夏公益教科书
