Resistivity and Temperature: A platinum wire is used to determine the melting point of indium. The resistance of the platinum wire is 2.000 ? at 20°C and increases to 3.072 ? as indium just starts to melt. What is the melting point of indium? The temperature coefficient of resistivity for platinum is 3.927 × 10-3/C°.
A. 116°C
B. 136°C
C. 156°C
D. 351°C
Answer: C
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