MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The stability factors change from npn to pnp transistor. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Why are we worried about β during the Collector feedback configuration? |
| A. | To maintain a stable q-point irrespective of β |
| B. | To increase the gain |
| C. | To decrease the output impedance |
| D. | To maintain a stable input impedance |
| Answer» B. To increase the gain | |
| 3. |
If β = 100, what should be the ratio of the collector to base resistance for achieving insensitivity to β? |
| A. | 110 |
| B. | 90 |
| C. | 20 |
| D. | 140 |
| Answer» E. | |
| 4. |
What is the condition of stability of the following circuit? |
| A. | Highly stable |
| B. | Poorly stable |
| C. | Marginally stable |
| D. | Unstable |
| Answer» C. Marginally stable | |
| 5. |
What is the stability factor against VBE for the collector feedback configuration? |
| A. | β/(Rc * (1 + β)) |
| B. | -β/(RB + Rc * (1 + β)) |
| C. | β/(RB + Rc * (1 + β)) |
| D. | -β/(Rc * (1 + β)) |
| Answer» D. -β/(Rc * (1 + β)) | |
| 6. |
From the base bias to the collector feedback configuration, the stability facto S reduces by a factor of __________ |
| A. | 1 + R1/(R1 + β) |
| B. | 1 + β * R1/(R1 + β) |
| C. | β * R1/(R1 + β) |
| D. | R1/(R1 + β) |
| Answer» C. β * R1/(R1 + β) | |
| 7. |
To keep the B.J.T. in the active region, what should be the relation between R1 and R2? |
| A. | R1 >> R2 |
| B. | R1 << R2 |
| C. | R1 = R2 |
| D. | No such relation |
| Answer» C. R1 = R2 | |
| 8. |
If the current gain of the transistor is β, what is the stability factor pertaining to IC and ICO? |
| A. | β+1/{1 + β * R1/(R1 + β)} |
| B. | β+1 |
| C. | β+1/{1 + β * R2/(R1 + β)} |
| D. | β+1/{1 + (R1 + β)} |
| Answer» B. β+1 | |
| 9. |
What kind of configuration is this? |
| A. | Collector feedback |
| B. | Base Bias |
| C. | Self Bias |
| D. | No bias |
| Answer» E. | |
| 10. |
What are the effects on the output voltage if the Collector resistance increases in a Collector feedback configuration? |
| A. | Not much effect |
| B. | Bias voltage reduces |
| C. | Bias voltage increases |
| D. | Bias voltage doubles |
| Answer» B. Bias voltage reduces | |
| 11. |
Due to the Collector feedback mechanism, the transistor remains always remains in the __________ |
| A. | Active mode |
| B. | Saturation mode |
| C. | Inverse Active |
| D. | Cut-off |
| Answer» B. Saturation mode | |
| 12. |
The Collector feedback helps to evade __________ |
| A. | Inverse Active mode |
| B. | Pinch Off |
| C. | Thermal Runaway |
| D. | Breakdown |
| Answer» D. Breakdown | |
| 13. |
The Collector feedback configuration helps to stabilize __________ |
| A. | Bias voltage |
| B. | Collector voltage |
| C. | Bias current |
| D. | Collector current |
| Answer» E. | |
| 14. |
The Collector feedback is done by connecting a resistor from the collector to the __________ |
| A. | Emitter |
| B. | Base |
| C. | Supply voltage |
| D. | Bias voltage |
| Answer» C. Supply voltage | |
| 15. |
The Collector feedback configuration is better than __________ |
| A. | Fixed Bias Configuration |
| B. | Voltage divider configuration |
| C. | C.E. configuration |
| D. | C.B. configuration |
| Answer» B. Voltage divider configuration | |