MCQOPTIONS
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MCQOPTIONS
This section includes 33 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately___________ |
| A. | 500 |
| B. | 100 |
| C. | 1000 |
| D. | 5000 |
| Answer» C. 1000 | |
| 2. |
If voltage feedback (negative) is applied to an amplifier, its output impedance ___________ |
| A. | Remains the same |
| B. | Is increased |
| C. | Is decreased |
| D. | None of the above |
| Answer» D. None of the above | |
| 3. |
When current feedback (negative) is applied to an amplifier, its input impedance ___________ |
| A. | Is decreased |
| B. | Is increased |
| C. | Remains the same |
| D. | None of the above |
| Answer» B. Is increased | |
| 4. |
When voltage feedback (negative) is applied to an amplifier, its input impedance ___________ |
| A. | Is decreased |
| B. | Is increased |
| C. | Remains the same |
| D. | None of the above |
| Answer» C. Remains the same | |
| 5. |
Emitter follower is used for ___________ |
| A. | Current gain |
| B. | Impedance matching |
| C. | Voltage gain |
| D. | None of the above |
| Answer» C. Voltage gain | |
| 6. |
When current feedback (negative) is applied to an amplifier, its output impedance |
| A. | Is increased |
| B. | Is decreased |
| C. | Remains the same |
| D. | None of the above |
| Answer» B. Is decreased | |
| 7. |
The value of negative feedback fraction is always ___________ |
| A. | Less than 1 |
| B. | More than 1 |
| C. | Equal to 1 |
| D. | None of the above |
| Answer» B. More than 1 | |
| 8. |
The output impedance of an emitter follower is ___________ |
| A. | High |
| B. | Very high |
| C. | Almost zero |
| D. | Low |
| Answer» E. | |
| 9. |
The voltage gain of an emitter follower is ___________ |
| A. | Much less than 1 |
| B. | Approximately equal to 1 |
| C. | Greater than 1 |
| D. | None of the above |
| Answer» C. Greater than 1 | |
| 10. |
The gain of an amplifier without feedback is 100 db. If a negative feedback of 3 db is applied, the gain of the amplifier will become ___________ |
| A. | 5 db |
| B. | 300 db |
| C. | 103 db |
| D. | 97 db |
| Answer» E. | |
| 11. |
If the output of an amplifier is 10 V and 100 mV from the output is fed back to the input, then feedback fraction is ___________ |
| A. | 10 |
| B. | 1 |
| C. | 1 |
| D. | 15 |
| Answer» D. 15 | |
| 12. |
When negative voltage feedback is applied to an amplifier, its voltage gain ___________ |
| A. | Is increased |
| B. | Is reduced |
| C. | Remains the same |
| D. | None of the above |
| Answer» C. Remains the same | |
| 13. |
An emitter follower has ___________ input impedance |
| A. | Zero |
| B. | Low |
| C. | High |
| D. | None of the above |
| Answer» D. None of the above | |
| 14. |
The gain of an amplifier with feedback is known as ___________ gain |
| A. | Resonant |
| B. | Open loop |
| C. | Closed loop |
| D. | None of the above |
| Answer» D. None of the above | |
| 15. |
Emitter follower is used for ___________%! |
| A. | Current gain |
| B. | Impedance matching |
| C. | Voltage gain |
| D. | None of the above |
| Answer» C. Voltage gain | |
| 16. |
When current feedback (negative) is applied to an amplifier, its output impedance%! |
| A. | Is increased |
| B. | Is decreased |
| C. | Remains the same |
| D. | None of the above |
| Answer» B. Is decreased | |
| 17. |
The value of negative feedback fraction is always ___________%! |
| A. | Less than 1 |
| B. | More than 1 |
| C. | Equal to 1 |
| D. | None of the above |
| Answer» B. More than 1 | |
| 18. |
The output impedance of an emitter follower is ___________%! |
| A. | High |
| B. | Very high |
| C. | Almost zero |
| D. | Low |
| Answer» E. | |
| 19. |
If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately___________%! |
| A. | 500 |
| B. | 100 |
| C. | 1000 |
| D. | 5000 |
| Answer» C. 1000 | |
| 20. |
*/*_When negative voltage feedback is applied to an amplifier, its voltage gain ___________? |
| A. | Is increased |
| B. | Is reduced |
| C. | Remains the same |
| D. | None of the above |
| Answer» C. Remains the same | |
| 21. |
*/*_The voltage gain of an emitter follower is ___________? |
| A. | Much less than 1 |
| B. | Approximately equal to 1 |
| C. | Greater than 1 |
| D. | None of the above |
| Answer» C. Greater than 1 | |
| 22. |
*/*_If voltage feedback (negative) is applied to an amplifier, its output impedance ___________? |
| A. | Remains the same |
| B. | Is increased |
| C. | Is decreased |
| D. | None of the above |
| Answer» D. None of the above | |
| 23. |
%_The voltage gain of an emitter follower is ____________% |
| A. | Much less than 1 |
| B. | Approximately equal to 1 |
| C. | Greater than 1 |
| D. | None of the above |
| Answer» C. Greater than 1 | |
| 24. |
%_If voltage feedback (negative) is applied to an amplifier, its output impedance ____________% |
| A. | Remains the same |
| B. | Is increased |
| C. | Is decreased |
| D. | None of the above |
| Answer» D. None of the above | |
| 25. |
_ An emitter follower has ___________ input impedance$? |
| A. | Zero |
| B. | Low |
| C. | High |
| D. | None of the above |
| Answer» D. None of the above | |
| 26. |
__The gain of an amplifier without feedback is 100 db. If a negative feedback of 3 db is applied, the gain of the amplifier will become _____________ |
| A. | 5 db |
| B. | 300 db |
| C. | 103 db |
| D. | 97 db |
| Answer» E. | |
| 27. |
The gain of an amplifier with feedback is known as ___________ gain$? |
| A. | Resonant |
| B. | Open loop |
| C. | Closed loop |
| D. | None of the above |
| Answer» D. None of the above | |
| 28. |
If the output of an amplifier is 10 V and 100 mV from the output is fed back to the input, then feedback fraction is ___________$? |
| A. | 10 |
| B. | 1 |
| C. | 1 |
| D. | 15 |
| Answer» D. 15 | |
| 29. |
When voltage feedback (negative) is applied to an amplifier, its input impedance ___________$? |
| A. | Is decreased |
| B. | Is increased |
| C. | Remains the same |
| D. | None of the above |
| Answer» C. Remains the same | |
| 30. |
A feedback circuit usually employs ___________ network |
| A. | Resistive |
| B. | Capacitive |
| C. | Inductive |
| D. | None of the above |
| Answer» B. Capacitive | |
| 31. |
When a negative voltage feedback is applied to an amplifier, its bandwidth___________ |
| A. | Is increased |
| B. | Is decreased |
| C. | Remains the same |
| D. | Insufficient data |
| Answer» B. Is decreased | |
| 32. |
Negative feedback is employed in ___________ |
| A. | Oscillators |
| B. | Rectifiers |
| C. | Amplifiers |
| D. | None of the above |
| Answer» D. None of the above | |
| 33. |
Emitter follower is a ___________ circuit |
| A. | Voltage feedback |
| B. | Current feedback |
| C. | Both voltage and current feedback |
| D. | None of the above |
| Answer» B. Current feedback | |