Guest

use of thermometer is based on which law of thermodynamics........law k naam k sath explanation b de dena

   

use of thermometer is based on which law of thermodynamics........law k naam k sath explanation b de dena


Grade:12

1 Answers

Anil Pannikar AskiitiansExpert-IITB
85 Points
13 years ago

Dear Rishav,

 

Zeroth Law, it says that when two bodies are separately in thermal equilibruim with a third body, then the two bodies are also in thermal equilibrium with each other.  The ordinary thermometer consists of mercury in a capillary tube. In this case mercury is the reference body. We can adjust the change in a thermal property, or length of a column of mercury, by putting the thermometer in thermal equilibrium with a known physical system. Metric thermometers, in Celsius, have the reference points fixed at the freezing and boiling point of water.If we then bring the thermometer into thermal equilibrium with any other system for example if you place it under your tongue we can determine the temperature of the other system by noting the change in the thermal property, which is shown in the thermometer. Objects in thermodynamic equilibrium have the same temperature.

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

All the best.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar  respectively : Click here to download the toolbar..

 

Askiitians Expert

Anil Pannikar

IIT Bombay

 

 

Think You Can Provide A Better Answer ?

ASK QUESTION

Get your questions answered by the expert for free