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Q. |
The instrument that measures and records the relative humidity of air is – |
A. | Hydrometer |
B. | Hygrometer |
C. | Lactometer |
D. | Barometer |
Answer» B. Hygrometer | |
Explanation: A hygrometer is an instrument used for measuring the moisture content in the environment. Humidity measurement instruments usually rely on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed. By calibration and calculation, these measured quantities can lead to a measurement of humidity. |
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