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प्रश्न
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?
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उत्तर
It is a property of mercury to expand when heated. Hence, after expansion, it rises in the capillary tube.
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संबंधित प्रश्न
A thermometer is used to measure ______.
Describe a clinical thermometer. How does it differ from the thermometer used in laboratory?
The body temperature of a healthy man is;
Match the following
| i. | Clinical thermometer | A form of energy |
| ii. | Normal temperature of human body | 100°C |
| iii. | Heat | 37°C |
| iv. | Boiling point of water | 0°C |
| v. | Melting point of water | Kink |
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The thermometer which ranger from -10°C to 110°C is ______.
All clinical thermometers have a ______ that prevents mercury from flowing back into the bulb.
Before use, the mercury level in clinical thermometer should be below ______.
Why mercury or alcohol is used in thermometers?
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.
