MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A particular intrinsic semiconductor has a resistivity of 50 (ohm-cm) at T = 300 K and 5 (ohm-cm) at T = 330 K. If change in mobility with temperature is neglected, the bandgap energy of the semiconductor is |
| A. | 1.9 eV |
| B. | 1.3 eV |
| C. | 2.6 eV |
| D. | 0.64 eV |
| Answer» C. 2.6 eV | |
| 2. |
Six volts is applied across a 2 cm long semiconductor bar. The average drift velocity is 104 cms. The electron mobility is |
| A. | 4396 cm<sup>2</sup>/V<sup>-s</sup> 2 |
| B. | 3 x 10<sup>4</sup> cm<sup>2</sup>/V<sup>-s</sup> |
| C. | 6 x 10<sup>4</sup> cm<sup>2</sup>V<sup>-s</sup> |
| D. | 3333 cm<sup>2</sup>/V<sup>-s</sup> |
| Answer» E. | |
| 3. |
A silicon sample doped n type at 10^18 cm3 have a resistance of 10 ohm. The sample has an area of 10^(-6) cm2 and a length of 10 m . The doping efficiency of the sample is ( n = 800 cm2/V-s ) |
| A. | 43.2% |
| B. | 78.1% |
| C. | 96.3% |
| D. | 54.3% |
| Answer» C. 96.3% | |
| 4. |
Two semiconductor material have exactly the same properties except that material A has a bandgap of 1.0
|
| A. | nmaterial B is |
| B. | 2016 |
| C. | 47.5 |
| D. | 58.23 |
| E. | 1048 |
| Answer» C. 47.5 | |