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प्रश्न
Why is it advised not to hold the thermometer by its bulb while reading it?
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उत्तर
It is advised not to hold the thermometer by its bulb while reading it because on holding a thermometer by its bulb, the mercury in the bulb expands due to our body temperature and gives a false reading.
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संबंधित प्रश्न
Mercury is often used in laboratory thermometers because it ______.
Draw the diagram of a clinical thermometer and label its parts.
A clinical thermometer is calibrated from to ______.
Digital thermometer is widely used for the measurement of the temperature due to ______.
Before use, the mercury level in clinical thermometer should be below ______.
Why mercury or alcohol is used in thermometers?
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.
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?
