Question

In a thermometer, there are 100 major divisions between the freezing point and the boiling point of water. If each major division has 5 minor divisions, what is the minimum reading that can be taken using the thermometer?

• A. 1℃
• B. 0.8℃
  
• C. 1.2℃
• D. 0.2 ℃
  

Answer 1

The correct option is D 0.2 ℃


We know that the freezing and the boiling points of water are 0 ℃ and 100 ℃ respectively. Since there are 100 major divisions between these values, each major division represents one degree change in temperature.

Also, each major division is further divided into 5 minor divisions.
Hence, the minimum reading that can be taken is
$\frac{100}{100\times 5}=0.2{}^{o}C$