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JEE Main20244 Apr 2024Morning ShiftPhysicsThermal Properties of MatterActual

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

Options

  1. A10
  2. B8
  3. C16
  4. D2

Correct answer

C. 16

Step-by-step solution

Given R₀=8 , R₁₀₀=10 R ₁₀₀= R ₀(1+ T ) Also, R₄₀₀=R₀ (1+ T ^1 ) aligned & 10=8(1+ 100) 100 = 1 4 & R ₄₀₀=8(1+400 )=8(1+1)=16 aligned

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