MCQOPTIONS
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MCQOPTIONS
This section includes 16 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. |
A full wave rectifier with a load resistance of 5KΩ uses an inductor filter of 15henry. The peak value of applied voltage is 250V and the frequency is 50 cycles per second. Calculate the ripple factor (ϒ). |
| A. | 0.1 |
| B. | 0.6 |
| C. | 0.5 |
| D. | 0.4 |
| Answer» E. | |
| 2. |
What causes to decrease the sudden rise in the current for a rectifier? |
| A. | the electrical energy |
| B. | The ripple factor |
| C. | The magnetic energy |
| D. | Infinite resistance |
| Answer» D. Infinite resistance | |
| 3. |
The output voltage VDC for a rectifier with inductor filter is given by_________ |
| A. | (2Vm/π)-IDCR |
| B. | (2Vm/π)+IDCR |
| C. | (2Vmπ)-IDCR |
| D. | (2Vmπ)+IDCR |
| Answer» B. (2Vm/π)+IDCR | |
| 4. |
A dc voltage of 380V with a peak ripple voltage not exceeding 7V is required to supply a 500Ω load. Find out the inductance required. |
| A. | 10.8henry |
| B. | 30.7henry |
| C. | 28.8henry |
| D. | 15.4henry |
| Answer» D. 15.4henry | |
| 5. |
A full wave rectifier with a load resistance of 5KΩ uses an inductor filter of 15henry. The peak value of applied voltage is 250V and the frequency is 50 cycles per second. Calculate the dc load current. |
| A. | 0.7mA |
| B. | 17mA |
| C. | 10.6mA |
| D. | 20mA |
| Answer» D. 20mA | |
| 6. |
The ripple factor (ϒ) of inductor filter is_________ |
| A. | ϒ = RZ3/√2ωL |
| B. | ϒ = RZ/3√2ωL |
| C. | ϒ = RZ3√2/ωL |
| D. | ϒ = RZ3/√2ωL |
| Answer» C. ϒ = RZ3√2/ωL | |
| 7. |
WHAT_CAUSES_TO_DECREASE_THE_SUDDEN_RISE_IN_THE_CURRENT_FOR_A_RECTIFIER??$ |
| A. | the electrical energy |
| B. | The ripple factor |
| C. | The magnetic energy |
| D. | Infinite resistance |
| Answer» D. Infinite resistance | |
| 8. |
A_full_wave_rectifier_with_a_load_resistance_of_5KΩ_uses_an_inductor_filter_of_15henry._The_peak_value_of_applied_voltage_is_250V_and_the_frequency_is_50_cycles_per_second._Calculate_the_ripple_factor_(ϒ).$# |
| A. | 0.1 |
| B. | 0.6 |
| C. | 0.5 |
| D. | 0.4 |
| Answer» E. | |
| 9. |
The output voltage VDC for a rectifier with inductor filter is given by________? |
| A. | (2V<sub>m</sub>/π)-I<sub>DC</sub>R |
| B. | (2V<sub>m</sub>/π)+I<sub>DC</sub>R |
| C. | (2V<sub>m</sub>π)-I<sub>DC</sub>R |
| D. | (2V<sub>m</sub>π)+I<sub>DC</sub>R |
| Answer» B. (2V<sub>m</sub>/‚âà√¨‚àö√ë)+I<sub>DC</sub>R | |
| 10. |
The inductor filter should be used when RL is consistently small because_________ |
| A. | Effective filtering takes place when load current is high |
| B. | Effective filtering takes place when load current is low |
| C. | Current lags behind voltage |
| D. | Current leads voltage |
| Answer» B. Effective filtering takes place when load current is low | |
| 11. |
A dc voltage of 380V with a peak ripple voltage not exceeding 7V is required to supply a 500Ω load. Find out the inductance required.$ |
| A. | 10.8henry |
| B. | 30.7henry |
| C. | 28.8henry |
| D. | 15.4henry |
| Answer» D. 15.4henry | |
| 12. |
The output of a rectifier is pulsating because_________ |
| A. | It has a pulse variations |
| B. | It gives a dc output |
| C. | It contains both dc and ac components |
| D. | It gives only ac components |
| Answer» D. It gives only ac components | |
| 13. |
A full wave rectifier with a load resistance of 5KΩ uses an inductor filter of 15henry. The peak value of applied voltage is 250V and the frequency is 50 cycles per second. Calculate the dc load current.$ |
| A. | 0.7mA |
| B. | 17mA |
| C. | 10.6mA |
| D. | 20mA |
| Answer» D. 20mA | |
| 14. |
The inductor filter gives a smooth output because_________ |
| A. | It offers infinite resistance to ac components |
| B. | It offers infinite resistance to dc components |
| C. | Pulsating dc signal is allowed |
| D. | The ac signal is amplified |
| Answer» B. It offers infinite resistance to dc components | |
| 15. |
The ripple factor (ϒ) of inductor filter is_________$ |
| A. | ϒ = R<sub>Z</sub>3/√2ωL |
| B. | ϒ = R<sub>Z</sub>/3√2ωL |
| C. | ϒ = R<sub>Z</sub>3√2/ωL |
| D. | ϒ = R<sub>Z</sub>3/√2ωL |
| Answer» C. ‚âà√¨‚àö‚↠= R<sub>Z</sub>3‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ2/‚âà√¨‚àö¬¢L | |
| 16. |
What is the effect of an inductor filter on a multi frequency signal? |
| A. | Dampens the AC signal |
| B. | Dampens the DC signal |
| C. | To reduce ripples |
| D. | To change the current |
| Answer» B. Dampens the DC signal | |