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Concepts Of Physics MCQ Edition [Volume 2]PhysicsThermal and Chemical Effects of Electric Current

Examine the following statements about a thermocouple. (A) The neutral temperature is independent of the cold junction temperature. (B) The inversion temperature is independent of the cold junction temperature.

Options

  1. ABoth statements A and B are false
  2. BStatement A is true but B is false
  3. CStatement B is true but A is false
  4. DBoth statements A and B are true

Correct answer

B. Statement A is true but B is false

Step-by-step solution

The neutral temperature T_n is a characteristic property of the pair of metals used in the thermocouple and is independent of the cold junction temperature T_c . The inversion temperature T_i depends on the cold junction temperature T_c according to the relation T_i - T_n = T_n - T_c , which gives T_i = 2T_n - T_c . Thus, statement A is true and statement B is false.

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