MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the number of electrons (majority carrier) in a semiconductor is 5 X 1020 m-3 and μe is 0.135 mho, find the resistivity of the semiconductor. |
| A. | 0.0926 Ωm |
| B. | 0.0945 Ωm |
| C. | 0.0912 Ωm |
| D. | 0.0978 Ωm |
| Answer» B. 0.0945 Ωm | |
| 2. |
Identify the type of material. |
| A. | Intrinsic Semiconductor |
| B. | N-Type semiconductor |
| C. | P-Type semiconductor |
| D. | Conductor |
| Answer» D. Conductor | |
| 3. |
Pure Si at 300 K has equal electron (ni) and hole concentration (p) of 1.5 X 1016 m-3. Doping by indium increases p to 4.5 X 1022 m-3. What is n in the doped silicon? |
| A. | 4.5 X 109 m-3 |
| B. | 4.5 X 1022 m-3 |
| C. | 5 X 109 m-3 |
| D. | d)5 X 1022 m-3 |
| Answer» D. d)5 X 1022 m-3 | |
| 4. |
The Hall coefficient of a specimen is 3.66 x 10-4 m3C-1. If it’s resistivity is 8.93 x 10-3 Ωm, what will be its mobility? |
| A. | 0.01 m2V-1s-1 |
| B. | 0.02 m2V-1s-1 |
| C. | 0.03 m2V-1s-1 |
| D. | 0.04 m2V-1s-1 |
| Answer» E. | |
| 5. |
The following graph depicts the I-V characteristics of which instrument? |
| A. | Photodiode |
| B. | Light Emitting Diode |
| C. | Solar Cell |
| D. | Zener diode |
| Answer» D. Zener diode | |