MCQOPTIONS
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MCQOPTIONS
This section includes 4 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. |
The Fermi temperature of a metal is 24600K. Calculate the Fermi velocity. |
| A. | 0.5m/s |
| B. | 1.38m/s |
| C. | 0.8633 10<sup>6</sup>m/s |
| D. | 9.11 10<sup>-3</sup>m/s |
| Answer» D. 9.11 10<sup>-3</sup>m/s | |
| 2. |
Calculate the drift velocity of the free electrons with mobility of 3.5 10-3 m2/Vs in copper for an electric field strength of 0.5 V/m. |
| A. | 3.5 m/s |
| B. | 1.75 10<sup>3</sup> m/s |
| C. | 11.5 m/s |
| D. | 1.75 10<sup>-3</sup> m/s |
| Answer» E. | |
| 3. |
A uniform silver wire has a resistivity of 1.54 10-18 ohm/m at room temperature. For an electric field along the wire of 1 volt/cm. Compute the mobility, assuming that there are 5.8 1028 conduction electrons/m3. |
| A. | 1.54 m<sup>2</sup>/Vs |
| B. | 6.9973m<sup>2</sup>/Vs |
| C. | 6.9973 10<sup>-3</sup> m<sup>2</sup>/Vs |
| D. | 0.69973m/s |
| Answer» D. 0.69973m/s | |
| 4. |
The free electrons collide with the lattice elastically. |
| A. | True |
| B. | False |
| Answer» B. False | |