MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
Do the intrinsic Fermi energy level changes with the addition of dopants and acceptors? |
| A. | tTrue |
| B. | tFalse |
| Answer» C. | |
| 2. |
The fF (E) decreases in which of the following band for p-type semiconductor? |
| A. | tConduction band |
| B. | tDonor band |
| C. | tAcceptor band |
| D. | tValence band |
| Answer» B. tDonor band | |
| 3. |
The 1-fF (E) increases in which of the following band for n type semiconductor? |
| A. | tConduction band |
| B. | tDonor band |
| C. | tAcceptor band |
| D. | tValence band |
| Answer» E. | |
| 4. |
If Ef>Efi, then what is the type of the semiconductor? |
| A. | tn-type |
| B. | tP-type |
| C. | tElemental |
| D. | tCompound |
| Answer» B. tP-type | |
| 5. |
Consider a silicon wafer having Nc=2.8*1019cm-3 and the Fermi energy is .25eV below the conduction band. Calculate the equilibrium concentrations of electrons at T=300K? |
| A. | t18*10<sup>16</sup>cm<sup>-3</sup> |
| B. | t1.8*10<sup>16</sup>cm<sup>-3</sup> |
| C. | t1.8*10<sup>14</sup>cm<sup>-3</sup> |
| D. | t180*10<sup>16</sup>cm<sup>-3</sup> |
| Answer» B. t1.8*10<sup>16</sup>cm<sup>-3</sup> | |
| 6. |
Do the Fermi energy level changes in a semiconductor? |
| A. | tTrue |
| B. | tFalse |
| Answer» B. tFalse | |
| 7. |
Identify the correct condition for a semiconductor to be electrically neutral. |
| A. | tN<sub>d</sub>+p=N<sub>a</sub>+n |
| B. | tN<sub>d</sub>-p=N<sub>a</sub>+n |
| C. | tN<sub>d</sub>+p=N<sub>a</sub>-n |
| D. | tN<sub>d</sub>-p=N<sub>a</sub>-n |
| Answer» B. tN<sub>d</sub>-p=N<sub>a</sub>+n | |
| 8. |
For which type of material, the number of free electron concentration is equal to the number of donor atoms? |
| A. | tP type semiconductor |
| B. | tMetal |
| C. | tN-type semiconductor |
| D. | tInsulator |
| Answer» D. tInsulator | |
| 9. |
Calculate the number of electrons is the number of holes are 15*1010? |
| A. | t15*10<sup>10</sup> |
| B. | t1.5*10<sup>8</sup> |
| C. | t1.5*10<sup>9</sup> |
| D. | t1.5*10<sup>10</sup> |
| Answer» D. t1.5*10<sup>10</sup> | |
| 10. |
Is n/p=ni2 is a correct formula? |
| A. | tTrue |
| B. | tFalse |
| Answer» C. | |