Gk Questions with AnswersPhysics General Knowledge Questions and Answers
| 9. | Wavelength range of visible light is | ||
|---|---|---|---|
| A. 200-900 nm | |||
| B. 600-780 nm | |||
| C. 300-800 nm | |||
| D. 390-780 nm | |||
| Answer | ||
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| 10. | Which one of the following is not needed in a nuclear fission reactor? | ||
|---|---|---|---|
| A. Moderator | |||
| B. Coolant | |||
| C. Control device | |||
| D. Accelerator | |||
| Answer | ||
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| 11. | L.P.G. is mostly liquefied | ||
|---|---|---|---|
| A. Butane | |||
| B. Methane | |||
| C. Hydrogen | |||
| D. Oxygen | |||
| Answer | ||
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| 12. | Sound cannot travel through | ||
|---|---|---|---|
| A. Gases | |||
| B. Solids | |||
| C. Vacuum | |||
| D. Liquids | |||
| Answer | ||
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