Question

In a given thermometer, there are 100 major divisions between the freezing point and boiling point of water. Each major division is equal to 5 minor divisions, then is the minimum reading that can be taken using this thermometer

• A. ${0.1}^{\circ }C$
• B. ${0.2}^{\circ }C$
• C. ${0.3}^{\circ }C$
• D. ${0.4}^{\circ }C$

Answer 1

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

We know, the freezing and boiling point of water is $0^{\circ }C$ and ${100}^{\circ }C$ 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 minimum reading that can be taken is $\frac{100}{100\times 5}={0.2}^{\circ }C$.