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प्रश्न
You may have noticed that a few sharp jerks are given to a clinical thermometer before using it. Why is it done so?
उत्तर
A clinical thermometer has a kink that prevents immediate backflow of the mercury from the tube to the bulb, thus allowing us to read the temperature conveniently. This is the reason why we give a jerk to the thermometer before taking a new reading. The jerk positions the mercury below the kink into the bulb.
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संबंधित प्रश्न
What is the use of kink in clinical thermometer?
Why do we jerk a clinical thermometer before we measure the body temperature?
The thermometer which ranger from -10°C to 110°C is ______.
Before use, the mercury level in clinical thermometer should be below ______.
What is the boiling point of mercury?
Name the principle which is used in a thermometer.
Explain the construction and working of the clinical thermometer.
Four arrangements to measure the temperature of the ice in a beaker with a laboratory thermometer are shown in Figure 4.2 (a, b, c and d). Which one of them shows the correct arrangement for accurate measurement of temperature?
Fig 4.3 (a–d) shows a student reading a doctor’s thermometer. Which of the figure indicates the correct method of reading temperature?
Why is it advised not to hold the thermometer by its bulb while reading it?
