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प्रश्न
Describe a clinical thermometer. How does it differ from the thermometer used in laboratory?
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उत्तर
A clinical thermometer has a narrow stem and a long bulb filled with mercury (or alcohol). There is a small constriction in the stem above the bulb. When the bulb of the thermometer is held in the armpit or the mouth of a patient, the mercury (or alcohol) in the bulb rises in the stem.
When it is taken out of the patient’s body, the small constriction does not allow the mercury (or alcohol) from the stem to retreat into the bulb. Thus, this arrangement enables us to read the temperature of the patient’s body at ease after the removal of the thermometer from his body
The figure shows a clinical thermometer. It has a slight bend or kink in the stem just above the bulb, this kink is called the constriction which prevents the mercury from falling back all by itself. As the body temperature of a healthy person is 37°C, clinical thermometers are designed to measure temperatures between 35°C and 42°C.
Clinical thermometer
संबंधित प्रश्न
The body temperature of a healthy man is;
Mercury is often used in laboratory thermometers because it ______.
The thermometer which ranger from -10°C to 110°C is ______.
Digital thermometer is widely used for the measurement of the temperature due to ______.
Digital thermometers do not use ______.
Mercury is a poor conductor of heat.
Match the following :
| 1. | Mercury | a. | Maximum minimum thermometer |
| 2. | Weather report | b. | -173.15 degree C |
| 3. | 32degree F | c. | Opaque and shining |
| 4. | 100 K | d. | 0 degree C |
Mention the use of laboratory thermometers.
We are advised to avoid keeping the clinical thermometer in the sun or near a flame. Why?
You may have noticed that a few sharp jerks are given to a clinical thermometer before using it. Why is it done so?
