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]
A platinum wire is used to determkx+(o-)i 9chbgz6 kph ine the melting (2*k/a3j i sx1kqf.yzwn4,mwfyrk )l point of indium. The resistance of the platinum wire f(k/wmj. i yf ,y)nwkr1s4*q2kzx la3 is $2.000 \; \Omega$ at $20 ^{\circ}C$ and increases to $3.072 \; \Omega$ as indium starts to melt. What is the melting point of indium? (The temperature coefficient of resistivity for platinum is $3.9 \times 10^{-3} /^{\circ}C$.)
A. $117 ^{\circ}C$
B. $137 ^{\circ}C$
C. $157 ^{\circ}C$
D. $351 ^{\circ}C$
参考答案: C
本题详细解析:
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