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NEET2010PhysicsThermal Properties of MatterActual

The thermo emf E in volt of a certain thermo-couple is found to vary with temperature difference in ^ C between the two junctions according to the relation E=30 - ^2 15 The neutral temperature for the thermo-couple will be

Options

  1. A450^ C
  2. B400^ C
  3. C225^ C
  4. D30^ C

Correct answer

C. 225^ C

Step-by-step solution

Given, E =30 - ^2 15 At neutral temperature aligned dE d & =0 30- 2 15 & =0 & =225^ C aligned

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