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
(E) none of the above

