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. |
What is the conduction angle for Class B push-pull amplifier? |
| A. | 0 |
| B. | 90 |
| C. | 180 |
| D. | 270 |
| Answer» D. 270 | |
| 2. |
For a Class B amplifier, the utilized load power is 300W and the Dc power is 500W, find efficiency. |
| A. | 30% |
| B. | 60% |
| C. | 90% |
| D. | 100% |
| Answer» C. 90% | |
| 3. |
FOR_A_CLASS_B_AMPLIFIER,_THE_UTILIZED_LOAD_POWER_IS_300W_AND_THE_DC_POWER_IS_500W,_FIND_EFFICIENCY.?$ |
| A. | 30% |
| B. | 60% |
| C. | 90% |
| D. | 100% |
| Answer» C. 90% | |
| 4. |
What is the conduction angle for Class B push-pull amplifier?$ |
| A. | 0 |
| B. | 90 |
| C. | 180 |
| D. | 270 |
| Answer» D. 270 | |
| 5. |
How to avoid cross over distortion? |
| A. | By using more resistance |
| B. | By using more capacitance |
| C. | By using more Inductance |
| D. | By shifting the Q point above cut off |
| Answer» E. | |
| 6. |
What is cross over distortion? |
| A. | Effect occurred during switching of transistor after every half cycle |
| B. | Distortion occurred due to resistors |
| C. | Distortion occurred due to Capacitors |
| D. | Distortion occurred due to Inductors |
| Answer» B. Distortion occurred due to resistors | |
| 7. |
What kind of design is used to avoid transformer usage? |
| A. | High resistance |
| B. | Matched load |
| C. | Complementary symmetry |
| D. | Capacitive Model |
| Answer» D. Capacitive Model | |
| 8. |
Which is the main disadvantage of class B amplifiers? |
| A. | Expensive |
| B. | Less efficient |
| C. | More power dissipation |
| D. | More heat dissipation |
| Answer» B. Less efficient | |
| 9. |
What is the value of the maximum efficiency of the class B amplifier? |
| A. | 25% |
| B. | 35% |
| C. | 35% to 50% |
| D. | 50% to 70% |
| Answer» E. | |
| 10. |
What happens when class B amplifier is in a quiescent state? |
| A. | No current flows through the transistor |
| B. | Maximum current flows through the transistor |
| C. | Half of the maximum current flows through the transistor |
| D. | Quarter of the maximum current flows |
| Answer» B. Maximum current flows through the transistor | |
| 11. |
Class B amplifier Produces output even if the input is zero. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Where does the Q point lie for class B amplifier? |
| A. | Active |
| B. | Cut off |
| C. | Saturation |
| D. | Between saturation and active |
| Answer» C. Saturation | |