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Concepts Of Physics MCQ Edition [Volume 2]
Exam
Concepts Of Physics MCQ Edition [Volume 2]
Subject
Physics
Chapter
Thermal and Chemical Effects of Electric Current

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

Examine the following statements about a thermocouple. (A) The...

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 TnT_n is a characteristic property of the pair of metals used in the thermocouple and is independent of the cold junction temperature TcT_c.

The inversion temperature TiT_i depends on the cold junction temperature TcT_c according to the relation Ti−Tn=Tn−TcT_i - T_n = T_n - T_c, which gives Ti=2Tn−TcT_i = 2T_n - T_c.

Thus, statement A is true and statement B is false.
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