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| Q. |
When a tubelight breaks, a cracking sound is produced because ____? |
| A. | Pressure inside the lamp is less than atmospheric pressure |
| B. | Pressure inside the lamp is more than atmospheric pressure |
| C. | The lamp is filled with reactive gases |
| D. | The lamp is filled with mercury vapour |
| Answer» A. Pressure inside the lamp is less than atmospheric pressure | |
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