MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 9 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 region is for instrinsic breakdown? |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 2. |
The most common mode of breakdown in ceramic insulators is _____________ |
| A. | Defect Breakdown |
| B. | Thermal Breakdown |
| C. | Intrinsic Breakdown |
| D. | Electrochemical Breakdown |
| Answer» C. Intrinsic Breakdown | |
| 3. |
The process of breakdown is accelerated by the presence of ____________ |
| A. | Impurities |
| B. | Conduction |
| C. | Humidity |
| D. | Magnetic Field |
| Answer» B. Conduction | |
| 4. |
The presence of porosity in dielectrics is detrimental for higher dielectric strength. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
In which type of breakdown, an avalanche of electrons is formed? |
| A. | Defect Breakdown |
| B. | Thermal Breakdown |
| C. | Intrinsic Breakdown |
| D. | Electrochemical Breakdown |
| Answer» D. Electrochemical Breakdown | |
| 6. |
Dielectric breakdown occurs in gases due to ____________ |
| A. | Corona Discharge |
| B. | Dielectric heating |
| C. | Intrinsic breakdown |
| D. | Defect breakdown |
| Answer» B. Dielectric heating | |
| 7. |
Beyond breakdown voltage, dielectrics become insulating. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
Mica has a dielectric strength of _____________ |
| A. | 50 X 106 V/m |
| B. | 100 X 106 V/m |
| C. | 150 X 106 V/m |
| D. | 200 X 106 V/m |
| Answer» C. 150 X 106 V/m | |
| 9. |
Which of the following is the correct expression for the dielectric strength? |
| A. | d/Vb |
| B. | Vb/d |
| C. | Vbd |
| D. | Vb/d2 |
| Answer» C. Vbd | |