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 coefficiemn *7onug/ l:6.a *ndrd plvf)n/5na bh)l 5:p9 ru (o.ajzpeqnsrdt 21t of resistivity of 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:
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