Temperature And Its Scales MCQ - Practice Questions with Answers

Temperature

• Temperature is the degree of hotness or coldness of a body. Heat always flows 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. The 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, the ice point is taken at 0° and the steam point is taken at 100°. The temperature measured on this scale is all in degrees Celsius(°C).

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

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

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

The 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 scales 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 scales -