[amp_mcq option1=”heating time constant” option2=”cooling time constant” option3=”either (A) or (B)” option4=”none of the above” correct=”option1″]
The correct answer is A. heating time constant.
The heating time constant is the time it takes for a system to reach 63.2% of its final steady-state temperature after being switched on. It is a measure of how quickly a system responds to changes in temperature.
The cooling time constant is the time it takes for a system to reach 63.2% of its final steady-state temperature after being switched off. It is a measure of how quickly a system loses heat.
The heating time constant is always greater than the cooling time constant. This is because it takes more energy to heat up a system than it does to cool it down.
The heating time constant is a useful parameter for designing and controlling systems that are sensitive to changes in temperature. For example, it can be used to calculate the time it takes for a room to warm up after the heating is turned on, or the time it takes for a refrigerator to cool down after the door is opened.