Physics Unit18: Electric Currents (id: 38813d9a6)

本题目来源于试卷: Physics Unit18: Electric Currents，类别为 通用国际物理

[单选题]
The temperature coefficient of s+jtws(av1fm 9pcb1 3resistivity of5z f/lyw(ex1:c0zegk platinum is $3.9\times {10}^{-3}{/}^{\circ }C$. If a platinum wire has a resistance of R at room temperature (${23}^{\circ }C$), to what temperature must it be heated in order to double its resistance to 2R?

A. ${279}^{\circ }C$
B. ${297}^{\circ }C$
C. ${729}^{\circ }C$
D. ${927}^{\circ }C$


参考答案:  A


本题详细解析: 暂无

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