MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
In a choke l section filter_______ |
| A. | the inductor and capacitor are connected across the load |
| B. | the inductor is connected in series and capacitor is connected across the load |
| C. | the inductor is connected across and capacitor is connected in series to the load |
| D. | the inductor and capacitor are connected in series |
| Answer» C. the inductor is connected across and capacitor is connected in series to the load | |
| 2. |
The ripple to heavy loads by a capacitor is_______ |
| A. | high |
| B. | depends on temperature |
| C. | low |
| D. | no ripple at all |
| Answer» D. no ripple at all | |
| 3. |
An L section filter with L=2henry and C= 49µF is used in the output of a full wave single phase rectifier that is fed from a 40-0-40 V peak transformer. The load current is 0.2A. Calculate the output dc voltage. |
| A. | 20.76V |
| B. | 24.46V |
| C. | 34.78V |
| D. | 12.67V |
| Answer» C. 34.78V | |
| 4. |
IN_A_CHOKE_L_SECTION_FILTER_______?$ |
| A. | the inductor and capacitor are connected across the load |
| B. | the inductor is connected in series and capacitor is connected across the load |
| C. | the inductor is connected across and capacitor is connected in series to the load |
| D. | the inductor and capacitor are connected in series |
| Answer» C. the inductor is connected across and capacitor is connected in series to the load | |
| 5. |
The ripple to heavy loads by a capacitor is______? |
| A. | high |
| B. | depends on temperature |
| C. | low |
| D. | no ripple at all |
| Answer» D. no ripple at all | |
| 6. |
What makes the load in a choke filter to bypass harmonic components? |
| A. | capacitor |
| B. | inductor |
| C. | resistor |
| D. | diodes |
| Answer» B. inductor | |
| 7. |
The rms value of ripple current for an L section filter is_______ |
| A. | I<sub>RMS</sub>=‚àö2/3*X<sub>L</sub>*V<sub>DC</sub> |
| B. | I<sub>RMS</sub>=‚àö2/3*X<sub>L</sub>*V<sub>DC</sub> |
| C. | I<sub>RMS</sub>=‚àö2/3*X<sub>L </sub>*V<sub>DC</sub> |
| D. | I<sub>RMS</sub>=‚àö2/3*X<sub>L</sub>*V<sub>DC</sub> |
| Answer» B. I<sub>RMS</sub>=‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ2/3*X<sub>L</sub>*V<sub>DC</sub> | |
| 8. |
The output dc voltage of an LC filter is_______ |
| A. | V<sub>DC</sub>=2V<sub>m</sub>/π + I<sub>DC</sub>R |
| B. | V<sub>DC</sub>=V<sub>m</sub>/π – I<sub>DC</sub>R |
| C. | V<sub>DC</sub>=2V<sub>m</sub>/π – 2I<sub>DC</sub>R |
| D. | V<sub>DC</sub>=2V<sub>m</sub>/π – I<sub>DC</sub>R |
| Answer» E. | |
| 9. |
The ripple factor for an l section filter is_______ |
| A. | ϒ= 1/6√2ω<sup>2</sup>LC |
| B. | ϒ= 6√2ω<sup>2</sup>LC |
| C. | ϒ= 6√3ω<sup>2</sup>LC |
| D. | ϒ= 1/6√3ω<sup>2</sup>LC |
| Answer» B. ‚âà√¨‚àö‚â†= 6‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ2‚âà√¨‚àö¬¢<sup>2</sup>LC | |
| 10. |
The condition for the regulation curve in a choke filter is_________ |
| A. | LC≥R<sub>L</sub>/3ω |
| B. | LC≤R<sub>L</sub>/3ω |
| C. | L≥R<sub>L</sub>/3ω |
| D. | LC≥R<sub>L</sub>3ω |
| Answer» B. LC‚Äö√Ñ√∂‚àö¬¢¬¨√üR<sub>L</sub>/3‚âà√¨‚àö¬¢ | |
| 11. |
The value of inductance at which the current in a choke filter does not fall to zero is_________ |
| A. | peak inductance |
| B. | cut-in inductance |
| C. | critical inductance |
| D. | damping inductance |
| Answer» D. damping inductance | |
| 12. |
Calculate LC for a full wave rectifier which provides 10V dc at 100mA with a maximum ripple of 2%. Input ac frequency is 50Hz. |
| A. | 40*10<sup>-6</sup> |
| B. | 10*10<sup>-6</sup> |
| C. | 30*10<sup>-6</sup> |
| D. | 90*10<sup>-6</sup> |
| Answer» B. 10*10<sup>-6</sup> | |
| 13. |
An L section filter with L=2henry and C= 49µF is used in the output of a full wave single phase rectifier that is fed from a 40-0-40 V peak transformer. The load current is 0.2A. Calculate the output dc voltage. |
| A. | 20.76V |
| B. | 24.46V |
| C. | 34.78V |
| D. | 12.67V |
| Answer» C. 34.78V | |