Q. The time constant of a thermocouple is
A. the time taken to attain the final temperature to be measured
B. the time taken to attain 50% of the value of initial temperature difference
C. the time taken to attain 63.2% of the value of initial temperature difference
D. determined by the time taken to reach 100°C from 0°C
Answer: the time taken to attain 63.2% of the value of initial temperature difference
