MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Electromagnetic Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the convection current when electron density of 200 units is travelling at a speed of 12m/s. |
| A. | 16.67 |
| B. | 2400 |
| C. | 2880 |
| D. | 0.06 |
| Answer» C. 2880 | |
| 2. |
Find the conduction current density when conductivity of a material is 500 units and corresponding electric field is 2 units. |
| A. | 500 |
| B. | 250 |
| C. | 1000 |
| D. | 2000 |
| Answer» D. 2000 | |
| 3. |
FIND_THE_CONDUCTION_CURRENT_DENSITY_WHEN_CONDUCTIVITY_OF_A_MATERIAL_IS_500_UNITS_AND_CORRESPONDING_ELECTRIC_FIELD_IS_2_UNITS.?$ |
| A. | 500 |
| B. | 250 |
| C. | 1000 |
| D. | 2000 |
| Answer» D. 2000 | |
| 4. |
Calculate the convection current when electron density of 200 units is travelling at a speed of 12m/s.$ |
| A. | 16.67 |
| B. | 2400 |
| C. | 2880 |
| D. | 0.06 |
| Answer» C. 2880 | |
| 5. |
The current flowing through an insulating medium is calle? |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Susceptibility |
| Answer» C. Radiation | |
| 6. |
For conductors, the free electrons will exist at |
| A. | Valence band |
| B. | Middle of valence and conduction band |
| C. | Will not exist |
| D. | Conduction band |
| Answer» E. | |
| 7. |
The current in a metal at any frequency is due to |
| A. | Conduction current |
| B. | Displacement current |
| C. | Both conduction and displacement current |
| D. | Neither conduction nor displacement current |
| Answer» B. Displacement current | |
| 8. |
Alternating current measured in a transmission line will be |
| A. | Peak value |
| B. | Average value |
| C. | RMS value |
| D. | Zero |
| Answer» D. Zero | |
| 9. |
Find the band gap energy when a light of wavelength 1240nm is incident on it. |
| A. | 1eV |
| B. | 2eV |
| C. | 3eV |
| D. | 4eV |
| Answer» B. 2eV | |
| 10. |
Conduction in metals is due to |
| A. | Electrons only |
| B. | Electrons and holes |
| C. | Holes only |
| D. | Applied electric field |
| Answer» B. Electrons and holes | |
| 11. |
Find the range of band gap energy for conductors. |
| A. | >6 eV |
| B. | 0.2-0.4 eV |
| C. | 0.4-2 eV |
| D. | 2-6 eV |
| Answer» C. 0.4-2 eV | |
| 12. |
Which of the following are conductors? |
| A. | Ceramics |
| B. | Plastics |
| C. | Mercury |
| D. | Rubber |
| Answer» D. Rubber | |