MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Linear Integrated Circuit knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
HOW_THE_AVERAGE_TEMPERATURE_COEFFICIENT_OF_OUTPUT_VOLTAGE_EXPRESSED_IN_FIXED_VOLTAGE_REGULATOR??$ |
| A. | miilivolts/<sup>o</sup>C |
| B. | miilivolts<sup>o</sup>C |
| C. | None of the mentioned |
| D. | <sup>o</sup>C/ miilivolts |
| Answer» B. miilivolts<sup>o</sup>C | |
| 2. |
Which of the following is not a characteristic of adjustable voltage regulators? |
| A. | Non-versatile |
| B. | Better performance |
| C. | Increased reliability |
| D. | None of the mentioned |
| Answer» B. Better performance | |
| 3. |
Compute the input voltage of 7805c voltage regulator with a current source that will deliver a 0.725A current to 65Ω, 10w load. (Assume reference voltage =5v)$ |
| A. | V<sub>in</sub> = 84v |
| B. | V<sub>in</sub> = 34v |
| C. | V<sub>in</sub> = 54v |
| D. | V<sub>in</sub> = 64v |
| Answer» D. V<sub>in</sub> = 64v | |
| 4. |
An IC 7840 regulator has an output current =180mA and internal resistor =10Ω. Find the collector current in the output using the transistor specification: ß=15 and VEB(ON) =1.5v?# |
| A. | 270mA |
| B. | 450mA |
| C. | 100mA |
| D. | 50mA |
| Answer» C. 100mA | |
| 5. |
The change in output voltage for the corresponding change in load current in a 7805 IC regulator is defined a? |
| A. | All of the mentioned |
| B. | Line regulation |
| C. | Load regulation |
| D. | Input regulation |
| Answer» D. Input regulation | |
| 6. |
Find the difference between output current having a load of 100Ω and 120Ω for 7805 IC regulator. Consider the following specification: Voltage across the load = 5v; Voltage across the internal resistor= 350mv.$ |
| A. | 8.4mA |
| B. | 7mA |
| C. | 9mA |
| D. | 3.4mA |
| Answer» B. 7mA | |
| 7. |
State the reason for thermal shutdown of IC regulator? |
| A. | Spikes in temperature |
| B. | Decrease in temperature |
| C. | Fluctuation in temperature |
| D. | Increase in temperature |
| Answer» E. | |
| 8. |
Which type of regulator is considered more efficient? |
| A. | All of the mentioned |
| B. | Special regulator |
| C. | Fixed output regulator |
| D. | Switching regulator |
| Answer» E. | |
| 9. |
To get a maximum output current, IC regulation are provided with |
| A. | Radiation source |
| B. | Heat sink |
| C. | Peak detector |
| D. | None of the mentioned |
| Answer» C. Peak detector | |
| 10. |
What is the dropout voltage in a three terminal IC regulator? |
| A. | |V<sub>in</sub>| ‚â• |V<sub>o</sub>|+2v |
| B. | |V<sub>in</sub>| < |V<sub>o</sub>|-2v |
| C. | |V <sub>in</sub>| = |V<sub>o</sub>| |
| D. | |V<sub>in</sub>| ≤ |V<sub>o</sub>| |
| Answer» B. |V<sub>in</sub>| < |V<sub>o</sub>|-2v | |
| 11. |
Which is not considered as a linear voltage regulator? |
| A. | Fixed output voltage regulator |
| B. | Adjustable output voltage regulator |
| C. | Switching regulator |
| D. | Special regulator |
| Answer» D. Special regulator | |