Advertisements
Advertisements
प्रश्न
Describe a clinical thermometer. How does it differ from the thermometer used in laboratory?
Advertisements
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
A thermometer is used to measure ______.
In thermometer when bulb comes in contact with hot object, liquid inside it ______.
Why do we use Mercury in thermometers? Can water be used instead of mercury? What are the problems in using it?
Draw the diagram of a clinical thermometer and label its parts.
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 ______.
Mention any two precautions to be followed while using a clinical thermometer.
Figure (a–d) shows a student reading a doctor’s thermometer. Which of the figure indicates the correct method of reading temperature?
A laboratory thermometer A is kept 7 cm away on the side of the flame while a similar thermometer B is kept 7 cm above the flame of a candle as shown in the following figure.
Which of the thermometers, A or B, will show a greater rise in temperature? Give reason for your answer.
