Temperature And Its Scales - Practice Questions & MCQ

Temperature

• Temperature is the degree of hotness or coldness of a body. Heat always flow from high temperature to low temperature if there is no external work is applied.
• Temperature is one of the seven fundamental quantities and its dimension is []. S.I. unit of temperature is Kelvin.

Scales of Temperature

To construct any scale of temperature, we have to take two fixed points . First fixed point is the freezing point (ice point) of water. The second fixed point is the boiling point (steam point) of water.

1. Celsius scale : In this scale ice point is taken 0° and steam point is taken 100°. The temperature measured on this scale all in degree Celsius(°C).

2. Farenheite scale : This scale of temperature has freezing point as 32°F and steam point as 212°F. 

3. Kelvin scale : The Kelvin temperature scale is also known as thermodynamic scale. The temperature measured on this scale are in Kelvin (K).

Note - The triple point of water is also selected to be the zero of scale of temperature

Temperature on any scale can be converted into any other scale by using the following formula -

$$
\frac{(\text { Reading on any scale }- \text { Ice point })}{(\text { Steam point }- \text { ice point })}
$$

All the above mentioned temperature scale are related to each other by the following relationship -

$$
\frac{C}{5}=\frac{F-32}{9}=\frac{K-273}{5}
$$
 

 The below table shows the range of various temperature scale -