A Platinum Wire Is Used to Determine the Melting Point $2.000 \Omega$

question 4

Multiple Choice

A platinum wire is used to determine the melting point of indium. The resistance of the platinum wire is $2.000 \Omega$ at $20 ^ { \circ } \mathrm { C }$ and increases to $3.072 \Omega$ as indium just starts to melt. What is the melting point of indium? The temperature coefficient of resistivity for platinum is $3.927 \times 10 ^ { - 3 } / \mathrm { C } ^ { \circ }$ .

• A) \(351 ^ { \circ } \mathrm { C }\)
• B) \(156 ^ { \circ } \mathrm { C }\)
• C) \(116 ^ { \circ } \mathrm { C }\)
• D) \(136 ^ { \circ } \mathrm { C }\)