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The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are 8 Ω and 10 Ω respectively. After inserting in a hot bath of temperature 400°C, the resistance of platinum wire is :

1. 2 Ω
2. 16 Ω
3. 8 Ω
4. 10 Ω

Correct answer: 16 Ω

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