本题目来源于试卷: Physics Unit18: Electric Currents，类别为 国际高中通用物理
[单选题]
The temperature coeffick n-ycym7d5t3i dpdncea -k ldi:4+() idvnb/15cnh 0:qqrh+l ent 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:
暂无
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