The thermal time constant is the time
- A. To reach the final steady temperature if the initial rate of increase of temperature were maintained constant
- B. To reach 63% of final steady temperature
- C. To reach 66.66% of final steady temperature
- D. To reach half of the final steady temperature
Answer: A. To reach the final steady temperature if the initial rate of increase of temperature were maintained constant
Explanation: Thermal time constant τ = H/A is classically defined as the time required to reach final steady-state temperature if the initial rate of temperature rise were maintained constant (also the time to reach 63.2% of steady temperature rise).