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# A clinical thermometer reads temperature from(A) $35^\circ C$ to $42^\circ C$ (B) $0^\circ C$ to $100^\circ C$ (C) $25^\circ C$ to $42^\circ C$ (D) $35^\circ C$ to $62^\circ C$

Last updated date: 23rd Jun 2024
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Hint The clinical thermometer is specifically designed to read temperatures achievable by a living human body. The human body has a very short range variation of temperature.

The clinical thermometer, specifically, is a type of thermometer which is designed to detect and read the range of temperatures that can be achieved by the living human body. It is mainly utilized to detect fever which is the increase in body temperature of the body, or hypothermia which is characterized as a decrease in the temperature of the body. The temperature of the normal human body is agreed to be about $37^\circ C$ , any temperature above a maximum of $38^\circ C$ is considered fever and a temperature below, and a body temperature around $35^\circ C$ is considered hypothermia.
Based on these, it is safe to conclude that a clinical thermometer which reads from anything as low as $25^\circ C$ and up to then $62^\circ C$ would be considered inefficient.
Hence the clinical temperature must be $35^\circ C - 42^\circ C$ .
The inefficiency of the thermometer as we mean is the extra inaccuracy it’ll possess due to the unnecessary range. For example, if a mercury in glass thermometer that is to be used as a clinical thermometer is marked from say, $0^\circ C - 100^\circ C$ , the resolution of the thermometer will be low thus the accuracy will be low compared to the same thermometer if it has been marked from $35^\circ C - 42^\circ C$ .