MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
The most costly coupling is ____________ coupling |
| A. | Transformer |
| B. | Impedance |
| C. | RC |
| D. | Direct |
| Answer» B. Impedance | |
| 2. |
The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used? |
| A. | 20W |
| B. | 5 W |
| C. | 25W |
| D. | 50W |
| Answer» B. 5 W | |
| 3. |
When no signal is applied, the approximate collector efficiency of class A power amplifier is ____________ |
| A. | 25% |
| B. | 10% |
| C. | 0% |
| D. | 50% |
| Answer» D. 50% | |
| 4. |
A power amplifier has comparatively ____________ β. |
| A. | Small |
| B. | Large |
| C. | Very large |
| D. | Same |
| Answer» B. Large | |
| 5. |
THE_MAXIMUM_A.C._POWER_OUTPUT_FROM_A_CLASS_A_POWER_AMPLIFIER_IS_10_W._WHAT_SHOULD_BE_THE_MINIMUM_POWER_RATING_OF_THE_TRANSISTOR_USED??$ |
| A. | 20W |
| B. | 5 W |
| C. | 25W |
| D. | 50W |
| Answer» B. 5 W | |
| 6. |
The most costly coupling is ____________ coupling$ |
| A. | Transformer |
| B. | Impedance |
| C. | RC |
| D. | Direct |
| Answer» B. Impedance | |
| 7. |
When no signal is applied, the approximate collector efficiency of class A power amplifier is ___________? |
| A. | 25% |
| B. | 10% |
| C. | 0% |
| D. | 50% |
| Answer» D. 50% | |
| 8. |
A class A power amplifier is sometimes called ____________ amplifier |
| A. | Reciprocating |
| B. | Single – ended |
| C. | Symmetrical |
| D. | Differential |
| Answer» C. Symmetrical | |
| 9. |
A power amplifier has comparatively ____________ β.$ |
| A. | Small |
| B. | Large |
| C. | Very large |
| D. | Same |
| Answer» B. Large | |
| 10. |
In class A operation, the operating point is generally located ____________ of the d.c. load line. |
| A. | At cut off point |
| B. | At the middle |
| C. | At saturation point |
| D. | In active region |
| Answer» C. At saturation point | |
| 11. |
Power amplifiers handle ____________ signals compare to voltage amplifiers |
| A. | small |
| B. | large |
| C. | very small |
| D. | equal |
| Answer» C. very small | |
| 12. |
The maximum efficiency of transformer coupled class A power amplifier is ____________ |
| A. | 50% |
| B. | 25% |
| C. | 30% |
| D. | 5% |
| Answer» B. 25% | |
| 13. |
The maximum efficiency of resistance loaded class A power amplifier is ____________ |
| A. | 5% |
| B. | 35% |
| C. | 25% |
| D. | 50% |
| Answer» D. 50% | |
| 14. |
A class A power amplifier uses ______________ |
| A. | Two transistors |
| B. | One transistor |
| C. | Three transistors |
| D. | Four transistors |
| Answer» C. Three transistors | |