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AP EAMCET2002PhysicsThermal Properties of Matter

The cold junction of a thermocouple is at 0^ C . The thermo e.m.f produced in the thermocouple is given by an equation E=16 T-0.04 T^2 , where T is the temperature of the hot junction. The temperature of inversion and neutral temperature of the thermocouple are

Options

  1. A200^ C ; 400^ C
  2. B400^ C ; 200^ C
  3. C200^ C ; 300^ C
  4. D300^ C ; 200^ C

Correct answer

B. 400^ C ; 200^ C

Step-by-step solution

Thermo emf E=16 T-0.04 T^2 At inversion temperature (T i ), E=0 aligned 0 & =16 T_i-0.04 T_i^2 16 T i & =0.04 T_i^2 T i & = 16 0.04 =400^ C aligned Neutral temperature T_n= T i+T 2 T= Temperature of cold end T_n= 400+0 2 =200^ C

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