MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
Photons are electrically neutral and are not deflected by electric and magnetic fields. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Klystron valve and Magnetron valve are used for the production of ___________ |
| A. | Radio Waves |
| B. | Micro Waves |
| C. | Infra-red |
| D. | Ultraviolet |
| Answer» C. Infra-red | |
| 3. |
An electron makes a transition from n = 5 state to n = 2 state in the hydrogen atom. What is the frequency of the emitted photon? |
| A. | 4.9 X 10<sup>14</sup> Hz |
| B. | 5.9 X 10<sup>14</sup> Hz |
| C. | 6.9 X 10<sup>14</sup> Hz |
| D. | 7.9 X 10<sup>14</sup> Hz |
| Answer» D. 7.9 X 10<sup>14</sup> Hz | |
| 4. |
The wavelength of a photon is 3000 A. The energy of the photon is ___________ |
| A. | 3.47 eV |
| B. | 4.54 eV |
| C. | 6.78 eV |
| D. | 2.12 eV |
| Answer» B. 4.54 eV | |
| 5. |
What is the frequency of a photon having energy 3.3 X 10-30 J? |
| A. | 4.0 X 10<sup>13</sup> Hz |
| B. | 5.0 X 10<sup>13</sup> Hz |
| C. | 6.0 X 10<sup>13</sup> Hz |
| D. | 7.0 X 10<sup>13</sup> Hz |
| Answer» C. 6.0 X 10<sup>13</sup> Hz | |
| 6. |
Radioactive decay of the nucleus emits ____________ |
| A. | Ultraviolet rays |
| B. | X-Rays |
| C. | Infra-red |
| D. | Gamma rays |
| Answer» E. | |
| 7. |
Stimulated emission is used for the production of ____________ |
| A. | Laser |
| B. | X-rays |
| C. | Gamma rays |
| D. | Infrared rays |
| Answer» B. X-rays | |
| 8. |
When an electron jumps from an excited state to ground state it __________ |
| A. | Emits a photon having energy 13.6 eV |
| B. | Absorbs a photon having energy 13.6 eV |
| C. | Emits a photon having energy the same as the energy difference between the two states |
| D. | Absorbs a photon having energy the same as the energy difference between the two states |
| Answer» D. Absorbs a photon having energy the same as the energy difference between the two states | |
| 9. |
Which of the following may not be conserved in a photon-particle collision? |
| A. | Total Energy |
| B. | Total momentum |
| C. | Number of photons |
| D. | Number of particles |
| Answer» D. Number of particles | |
| 10. |
An iron rod is heated. As it gets heated, it changes color. Which of the following colors indicates a very high temperature? |
| A. | Red |
| B. | Orange |
| C. | White |
| D. | Blue |
| Answer» E. | |
| 11. |
Hot bodies emit a specific type of radiation. What are they called? |
| A. | X-rays |
| B. | Black-body radiation |
| C. | Gamma radiations |
| D. | Visible light |
| Answer» C. Gamma radiations | |
| 12. |
In X-ray emission tubes, X-ray is emitted by the acceleration of _____ |
| A. | Atoms |
| B. | Protons |
| C. | Electrons |
| D. | Neutrons |
| Answer» D. Neutrons | |