MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Switching speed of P+ junction depends on _________ |
| A. | Mobility of minority carriers in P junction |
| B. | Life time of minority carriers in P junction |
| C. | Mobility of majority carriers in N junction |
| D. | Life time of minority carriers in N junction |
| Answer» E. | |
| 2. |
The base emitter voltage in a cut off region is _________ |
| A. | greater than 0.7V |
| B. | equal to 0.7V |
| C. | less than 0.7V |
| D. | cannot be predicted |
| Answer» D. cannot be predicted | |
| 3. |
The switching of power with a PNP transistor is called _________ |
| A. | sourcing current |
| B. | sinking current |
| C. | forward sourcing |
| D. | reverse sinking |
| Answer» B. sinking current | |
| 4. |
For the BJT, β=∞, VBEon=0.7V VCEsat=0.7V. The switch is initially closed. At t=0, it is opened. At which time the BJT leaves the active region? |
| A. | 20ms |
| B. | 50ms |
| C. | 60ms |
| D. | 70ms |
| Answer» C. 60ms | |
| 5. |
THE_BASE_EMITTER_VOLTAGE_IN_A_CUT_OFF_REGION_IS__________?$ |
| A. | greater than 0.7V |
| B. | equal to 0.7V |
| C. | less than 0.7V |
| D. | cannot be predicted |
| Answer» D. cannot be predicted | |
| 6. |
Switching_speed_of_P+_junction_depends_on__________$ |
| A. | Mobility of minority carriers in P junction |
| B. | Life time of minority carriers in P junction |
| C. | Mobility of majority carriers in N junction |
| D. | Life time of minority carriers in N junction |
| Answer» E. | |
| 7. |
The switching of power with a PNP transistor is called ________? |
| A. | sourcing current |
| B. | sinking current |
| C. | forward sourcing |
| D. | reverse sinking |
| Answer» B. sinking current | |
| 8. |
The time taken for a transistor to turn from saturation to cut off is _________ |
| A. | inversely proportional to charge carriers |
| B. | directly proportional to charge carriers |
| C. | charging time of the capacitor |
| D. | discharging time of the capacitor |
| Answer» C. charging time of the capacitor | |
| 9. |
Which of the following helps in reducing the switching time of a transistor? |
| A. | a resistor connected from base to ground |
| B. | a resistor connected from emitter to ground |
| C. | a capacitor connected from base to ground |
| D. | a capacitor connected from emitter to ground |
| Answer» B. a resistor connected from emitter to ground | |
| 10. |
The disadvantage of using the method of reverse biasing base emitter junction is_________ |
| A. | high voltage control signal |
| B. | low voltage control signal |
| C. | output swing |
| D. | incomplete switching of output |
| Answer» E. | |
| 11. |
The technique used to quickly switch off a transistor is by_________ |
| A. | reverse biasing its emitter to collector junction |
| B. | reverse biasing its base to collector junction |
| C. | reverse biasing its base to emitter junction |
| D. | reverse biasing any junction |
| Answer» D. reverse biasing any junction | |
| 12. |
The collector current will not reach the steady state value instantaneously because of_________ |
| A. | stray capacitances |
| B. | resistances |
| C. | input blocking capacitances |
| D. | coupling capacitance |
| Answer» B. resistances | |