Question

Which of the following is NOT true about a thermometer ?

• A. Thermometer is a device used to measure temperature.
  
• B. The height of the column of mercury inside a thermometer indicates the temperature.
  
• C. The height of the column of mercury inside a thermometer decreases when temperature increases.
  
• D. We can create markings on the thermometer by dividing the melting point and boiling point of temperature in hundred equal parts.
  

Answer 1

The correct option is C The height of the column of mercury inside a thermometer decreases when temperature increases.


Thermometer is a device used to measure temperature. The height of the column of mercury increases with increase in temperature and its height indicates the temperature.
When the markings of the scale of a thermometer get wiped out, we can recreate them by marking the melting point of ice (0°C) and boiling point of water(100°C) as minimum and maximum points respectively. The length between the maximum and minimum markings is then divided into 100 equal parts.