MCQOPTIONS
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MCQOPTIONS
This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following can be used in the vibrational analysis of structure? |
| A. | Maser |
| B. | Quarts |
| C. | Electrical waves |
| D. | Laser |
| Answer» E. | |
| 2. |
Which of the following is used in atomic clocks? |
| A. | Laser |
| B. | Quartz |
| C. | Maser |
| D. | Helium |
| Answer» D. Helium | |
| 3. |
DVD uses the laser. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Laser is called as a non-material knife. |
| A. | False |
| B. | True |
| Answer» C. | |
| 5. |
Which of the following can be used for the generation of laser pulse? |
| A. | Ruby laser |
| B. | Carbon dioxide laser |
| C. | Helium neon laser |
| D. | Nd- YAG laser |
| Answer» E. | |
| 6. |
Calculate the number of photons, from green light of mercury (ʎ = 4961 Å), required to do one joule of work. |
| A. | 4524.2×1018/m3 |
| B. | 2.4961×1018/m3 |
| C. | 2.4961/m3 |
| D. | 2.4961/m |
| Answer» C. 2.4961/m3 | |
| 7. |
DVD_USES_THE_LASER.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Which of the following can be used in a vibrational analysis of structure? |
| A. | Maser |
| B. | Quarts |
| C. | Electrical waves |
| D. | Laser |
| Answer» E. | |
| 9. |
Which_of_the_following_is_used_in_atomic_clocks?$ |
| A. | Laser |
| B. | Quartz |
| C. | Maser |
| D. | Helium |
| Answer» D. Helium | |
| 10. |
Laser is called as a non-material knife? |
| A. | False |
| B. | True |
| Answer» C. | |
| 11. |
What is the need to achieve population inversion? |
| A. | To excite most of the atoms |
| B. | To bring most of the atoms to ground state |
| C. | To achieve stable condition |
| D. | To reduce the time of production of laser |
| Answer» B. To bring most of the atoms to ground state | |
| 12. |
Which of the following can be used for generation of laser pulse? |
| A. | Ruby laser |
| B. | Carbon dioxide laser |
| C. | Helium neon laser |
| D. | Nd- YAG laser |
| Answer» E. | |
| 13. |
Calculate the number of photons, from green light of mercury ( é = 4961 √Ö),$ |
| A. | |
| B. | 4524.2√ó10<sup>18</sup>/m<sup>3</sup> |
| C. | 2.4961√ó10<sup>18</sup>/m<sup>3</sup> |
| Answer» C. 2.4961‚Äö√†√∂‚àö‚â•10<sup>18</sup>/m<sup>3</sup> | |
| 14. |
Calculate the wavelength of radiation emitted by an LED made up of a semiconducting material with band gap energy 2.8eV. |
| A. | 2.8 √Ö |
| B. | 4.3308 √Ö |
| C. | 5548.4 √Ö |
| D. | 4430.8 √Ö |
| Answer» E. | |
| 15. |
When laser light is focussed on a particular area for a long time, then that particular area alone will be heated. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
Which of the following is an example of optical pumping? |
| A. | Ruby laser |
| B. | Helium-Neon laser |
| C. | Semiconductor laser |
| D. | Dye laser |
| Answer» B. Helium-Neon laser | |
| 17. |
Which of the following is a unique property of laser? |
| A. | Directional |
| B. | Speed |
| C. | Coherence |
| D. | Wavelength |
| Answer» D. Wavelength | |