Question

What scale is used in clinical thermometers usually?
A. Fahrenheit Scale
B. Kelvin Scale
C. Celsius Scale
D. None of these

Answer 1

Hint:Clinical thermometers are used to measure the body temperature of human beings. Since they are used for measuring the body temperature of human beings that’s why their temperature range is not broad. Such thermometers are sensitive to small temperature changes also.

Complete answer:
Thermometers are used to measure the temperature of surrounding, living beings and heating objects. On the basis of their temperature ranges they have been used for different purposes. The clinical thermometer which usually measures only a small range of temperature is always kept at a celsius scale.

While measuring a large temperature range we generally prefer Fahrenheit and Kelvin scales. Kelvin scale is mostly used for laboratories and industry purposes. In a clinical thermometer we measure temperature on a celsius scale. The temperature of a clinical thermometer can vary from \[35{\text{ - 42}}{{\text{ }}^ \circ }C\] which is quite suitable for measuring the temperature of the human body. Clinical thermometers are mainly used in clinics by doctors and physicians. Therefore we can say that a clinical thermometer measures temperature in celsius scales usually.

Hence the correct option is C.

Note:The temperature range is quite small for a clinical thermometer, therefore nowadays Fahrenheit scale is also introduced in those thermometers which increase the temperature range of the thermometer. Also when we talk about the accuracy of a thermometer, we always prefer a thermometer which has a broad temperature. But we do not use the Kelvin scale because it is more broad than our requirement. Thus we use the Fahrenheit scale for measuring temperature. Also if we are measuring the temperature of a room in celsius then we will measure the temperature of the body in Fahrenheit scale.