| 01. | 1 Nautical mile ? 1.15 mile |
| 02. | A radar uses which type waves ? Radio |
| 03. | Heat from the sun is received by the earth through ? Radiation |
| 04. | Light Year is a unit of ? Distance |
| 05. | Sound does not travel in ? Vacuum |
| 06. | Sound travel maximum speed in ? Solid |
| 07. | Speed of sound in air ? 340 meter per second |
| 08. | The dynamo work on the principle of ? Electro Magnetic Induction |
| 09. | The force attraction of same type molecules is called ? Cohesion |
| 10. | The formation of rainbow is due to which phenomenon of light ? Refraction and Dispersion |
| 11 | The heating effect of sun rays is the presence of ? Infrared rays |
| 12. | The sky and sea see as blue due to the which phenomenon of light ? Scattering |
| 13. | The speed of light is highest in ? Vacuum |
| 14. | The speed of the sound in sea level ? 760 meter per minute |
| 15. | The spherical shape of a rain drop is due to ? Surface Tension |
| 16. | The time taken by sunlight to reach the earth is ? 8.30 Minute |
| 17. | The unit for supersonic jet planes ? Mach |
| 18. | The working principle of washing machine is ? Centrifugation |
| 19. | Unit of Electric charge ? Coulomb |
| 20. | Which lance is use in camera ? Convex Lense |
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