A Tungsten Wire Is Used to Determine the Melting Point

question 54

Multiple Choice

A tungsten wire is used to determine the melting point of indium.The resistance of the tungsten wire is 3.000 Ω at 20°C and increases to 4.850 Ω as the indium starts to melt.α_tungsten = 4.50 × 10−³ (°C) −¹.What is the melting temperature of indium?

• A) 132°C
• B) 157°C
• C) 351°C
• D) 731°C

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