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
In thermometer when bulb comes in contact with hot object, liquid inside it ______.
The common laboratory thermometer is a ______ thermometer
Fahrenheit scale is more sensitive that the Celsius scale.
Digital thermometers are mainly used to take body temperature.
What is the freezing point of alcohol?
Explain the construction and working of the clinical thermometer.
Figure (a–d) shows a student reading a doctor’s thermometer. Which of the figure indicates the correct method of reading temperature?
In a mercury thermometer, the level of mercury rises when its bulb comes in contact with a hot object. What is the reason for this rise in the level of mercury?
You may have noticed that a few sharp jerks are given to a clinical thermometer before using it. Why is it done so?
A solid metallic cube having a total surface area of 24 m2 is uniformly heated. If its temperature is increased by 10°C, calculate the increase in the volume of the cube.
(Given: α = 5.0 × 10-4°C-1)
