QS Study

For measuring temperature a sensitive thermometer is needed. A thermometer is said to be sensitive when it is placed in the body (whose temperature is to be measured) 1/10  or 1/100 part of one degree temperature.

Under the following conditions a liquid in glass thermometer becomes sensitive-

  • For a small change of temperature more change in the height of the liquid column.
  • Bulb should be of moderate size and the capillary tube should not be extremely narrow. If the bulb is large, heat capacity increases and if the bore is extremely narrow, then liquid cannot flow freely.