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. |
Ripple factor of a half wave rectifier is_________(Im is the peak current and RL is load resistance) |
| A. | 1.414 |
| B. | 1.21 |
| C. | 1.4 |
| D. | 0.48 |
| E. | a) 1.414b) 1.21c) 1.4d) 0.48 |
| Answer» C. 1.4 | |
| 2. |
If the input frequency of a half wave rectifier is 100Hz, then the ripple frequency will be_________ |
| A. | 150Hz |
| B. | 200Hz |
| C. | 100Hz |
| D. | 300Hz |
| Answer» D. 300Hz | |
| 3. |
Transformer utilisation factor of a half wave rectifier is _________ |
| A. | 0.234 |
| B. | 0.279 |
| C. | 0.287 |
| D. | 0.453 |
| Answer» D. 0.453 | |
| 4. |
What is the output as a function of the input voltage (for positive values) for the given figure. Assume it’s an ideal op-amp with zero forward drop (Di=0) |
| A. | 0 |
| B. | -Vi |
| C. | Vi |
| D. | 2Vi |
| Answer» D. 2Vi | |
| 5. |
The below figure arrives to a conclusion that _________ |
| A. | for Vi > 0, V0=-(R2/R1)Vi |
| B. | for Vi > 0, V0=0 |
| C. | Vi < 0, V0=-(R2/R1)Vi |
| D. | Vi < 0, V0=0 |
| Answer» C. Vi < 0, V0=-(R2/R1)Vi | |
| 6. |
The diode in a half wave rectifier has a forward resistance RF. The voltage is Vmsinωt and the load resistance is RL. The DC current is given by _________ |
| A. | Vm/√2RL |
| B. | Vm/(RF+RL)π |
| C. | 2Vm/√π |
| D. | Vm/RL |
| Answer» C. 2Vm/√π | |
| 7. |
IF_THE_INPUT_FREQUENCY_OF_A_HALF_WAVE_RECTIFIER_IS_100HZ,_THEN_THE_RIPPLE_FREQUENCY_WILL_BE_________?$ |
| A. | 150Hz |
| B. | 200Hz |
| C. | 100Hz |
| D. | 300Hz |
| Answer» D. 300Hz | |
| 8. |
Ripple_factor_of_a_half_wave_rectifier_is_________(Im_is_the_peak_current_and_RL_is_load_resistance)$ |
| A. | 1.414 |
| B. | 1.21 |
| C. | 1.4 |
| D. | 0.48 |
| Answer» C. 1.4 | |
| 9. |
Transformer utilisation factor of a half wave rectifier is ________? |
| A. | 0.234 |
| B. | 0.279 |
| C. | 0.287 |
| D. | 0.453 |
| Answer» D. 0.453 | |
| 10. |
If peak voltage for a half wave rectifier circuit is 5V and diode cut in voltage is 0.7, then peak inverse voltage on diode will be? |
| A. | 5V |
| B. | 4.9V |
| C. | 4.3V |
| D. | 6.7V |
| Answer» D. 6.7V | |
| 11. |
Efficiency of a half wave rectifier is |
| A. | 50% |
| B. | 60% |
| C. | 40.6% |
| D. | 46% |
| Answer» D. 46% | |
| 12. |
In a half wave rectifier, the sine wave input is 200sin300t. The average value of output voltage is? |
| A. | 57.876V |
| B. | 67.453V |
| C. | 63.694V |
| D. | 76.987V |
| Answer» D. 76.987V | |
| 13. |
In a half wave rectifier, the sine wave input is 50sin50t. If the load resistance is of 1K, then average DC power output will be? |
| A. | 3.99V |
| B. | 2.5V |
| C. | 5.97V |
| D. | 6.77V |
| Answer» C. 5.97V | |
| 14. |
The diode in a half wave rectifier has a forward resistance RF. The voltage is Vmsinωt and the load resistance is RL. The DC current is given by _________ |
| A. | V<sub>m</sub>/‚àö2R<sub>L</sub> |
| B. | V<sub>m</sub>/(R<sub>F</sub>+R<sub>L</sub>)π |
| C. | 2V<sub>m</sub>/√π |
| D. | V<sub>m</sub>/R<sub>L</sub> |
| Answer» C. 2V<sub>m</sub>/‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ‚âà√¨‚àö√ë | |