Verified Solution • 2025–26 Session moderate

QPages 217-218: Q3: HC Verma: Concepts of Physics - Volume 2 Thermal and Chemical Effects of Electric Current Pages 217-218: Q3 Solution: Consider the following statements regarding a thermocouple. A)…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often incorrectly assume that both neutral and inversion temperatures are intrinsic material properties independent of junction conditions. Remember that neutral temperature is fixed by the thermocouple materials, whereas inversion temperature varies with the cold junction temperature.

Consider the following statements regarding a thermocouple. A) The neutral temperature does not depend on the temperature of the cold junction. B) The inversion temperature does not depend on the temperature of the cold junction.

Multiple Choice Options

  • A A and B are correct
  • B A is correct but B is wrong
  • C B is correct but A is wrong
  • D A and B are wrong

Step-by-Step Verified Solution

**Answer:** (b) A is correct but B is wrong. **Step-by-Step Explanation:** Neutral temperature depends only on the materials, not on the cold junction temperature (A). Inversion temperature does depend on cold junction temperature (B wrong).

All Questions in this Chapter

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