MCQOPTIONS
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MCQOPTIONS
This section includes 10 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 p-type semiconductor, germanium is doped with which of the following? |
| A. | Gallium |
| B. | Copper |
| C. | Phosphorous |
| D. | Nitrogen |
| Answer» B. Copper | |
| 2. |
The dominant contribution to current comes from holes in case of which of the following? |
| A. | Metals |
| B. | Intrinsic semiconductors |
| C. | p-type extrinsic semiconductors |
| D. | n-type extrinsic semiconductors |
| Answer» D. n-type extrinsic semiconductors | |
| 3. |
The n-type semiconductor is which of the following? |
| A. | Positively charged |
| B. | Negatively charged |
| C. | Neutral |
| D. | Positive or negative depending upon doping materials |
| Answer» D. Positive or negative depending upon doping materials | |
| 4. |
Identify the property which is not characteristic for a semiconductor? |
| A. | At a very low temperature, it behaves like an insulator |
| B. | At higher temperatures, two types of charge carriers will cause conductivity |
| C. | The charge carriers are electrons and holes in the valence band at higher temperatures |
| D. | The semiconductor is electrically neutral |
| Answer» D. The semiconductor is electrically neutral | |
| 5. |
Boron when added as an impurity, into the silicon, produces n-type semiconductor. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
A small impurity is added to germanium to get a p-type semiconductor. Identify the impurity? |
| A. | Bivalent substance |
| B. | Trivalent substance |
| C. | Pentavalent substance |
| D. | Monovalent substance |
| Answer» C. Pentavalent substance | |
| 7. |
In n-type semiconductors, which one is the majority charge carriers? |
| A. | Holes |
| B. | Protons |
| C. | Neutrons |
| D. | Electrons |
| Answer» E. | |
| 8. |
Which of the following, when added as an impurity, into the silicon, produces n-type semiconductor? |
| A. | Phosphorous |
| B. | Aluminum |
| C. | Magnesium |
| D. | Sulfur |
| Answer» B. Aluminum | |
| 9. |
In a pure semiconductor crystal, if current flows due to breakage of crystal bonds, then what is the semiconductor is called? |
| A. | Acceptor |
| B. | Donor |
| C. | Intrinsic semiconductor |
| D. | Extrinsic semiconductor |
| Answer» D. Extrinsic semiconductor | |
| 10. |
On doping germanium metal, with a little amount of indium, what does one get? |
| A. | Intrinsic semiconductor |
| B. | Insulator |
| C. | n-type semiconductor |
| D. | p-type semiconductor |
| Answer» E. | |