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| Q. |
Which of the following is not correct? |
| A. | Ammeter measures the strength of electric current. |
| B. | Lactometer measures the relative density of milk. |
| C. | Rain gauge measures rain fall |
| D. | Hygrometer measures sound under water. |
| Answer» D. Hygrometer measures sound under water. | |
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Explanation: A hygrometer is a weather instrument used to measure the amount of humidity in the atmosphere |
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