MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In a pure semiconductor crystal, if current flows due to breakage of crystal bonds, then what is the semiconductor called? |
| A. | Acceptor |
| B. | Donor |
| C. | Intrinsic semiconductor |
| D. | Extrinsic semiconductor |
| Answer» D. Extrinsic semiconductor | |
| 2. |
At which temperature, a pure semiconductor behaves slightly as a conductor? |
| A. | Low temperature |
| B. | Room temperature |
| C. | High temperature |
| D. | Vacuum |
| Answer» D. Vacuum | |
| 3. |
Choose the false statement from the following. |
| A. | In conductors the valence and conduction band overlap |
| B. | Substances with an energy gap of the order of 10 eV are insulators |
| C. | The resistivity of a semiconductor increases with increase in temperature |
| D. | The conductivity of a semiconductor increases with increase in temperature |
| Answer» D. The conductivity of a semiconductor increases with increase in temperature | |
| 4. |
At absolute zero, Si acts as which of the following? |
| A. | Non-metal |
| B. | Metal |
| C. | Insulator |
| D. | Capacitor |
| Answer» D. Capacitor | |
| 5. |
A semiconductor is damaged by a strong current because of a lack of free electrons. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
In semiconductors at a room temperature correspond to which among the following? |
| A. | The valence band is partially empty and the conduction band is partially filled |
| B. | The valence band is filled and the conduction band is partially filled |
| C. | The valence band is filled |
| D. | The conduction band is empty |
| Answer» B. The valence band is filled and the conduction band is partially filled | |
| 7. |
Holes are charge carriers in which one of the following? |
| A. | Intrinsic semiconductors |
| B. | Ionic solids |
| C. | n-type semiconductors |
| D. | Metals |
| Answer» B. Ionic solids | |
| 8. |
The probability of electrons to be found in the conduction band of an intrinsic semiconductor at finite temperature is which of the following? |
| A. | Increases exponentially with the increasing bandgap |
| B. | Decreases exponentially with the increasing bandgap |
| C. | Decreases with increasing temperature |
| D. | Is independent of the temperature and the bandgap |
| Answer» C. Decreases with increasing temperature | |
| 9. |
An intrinsic semiconductor, at the absolute zero temperature, behaves like which one of the following? |
| A. | Insulator |
| B. | Superconductor |
| C. | n-type semiconductor |
| D. | p-type semiconductor |
| Answer» B. Superconductor | |