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. $0.2{}^{\circ }\text{C}$
• B. $1.2{}^{\circ }\text{C}$
• C. $0.8{}^{\circ }\text{C}$
• D. $1.0{}^{\circ }\text{C}$

Answer 1

The correct option is A $0.2{}^{\circ }\text{C}$

We know that the freezing and the boiling points of water are $0{}^{\circ }\text{C}$ and $100{}^{\circ }\text{C}$ 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 to $5$ minor divisions. Hence, the minimum reading that can be taken is $\frac{100}{100\times 5}=0.2{}^{\circ }\text{C}$