MCQOPTIONS
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MCQOPTIONS
This section includes 5 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. |
Compute the input voltage of 7805c voltage regulator with a current source that will deliver a 0.725A current to 65 , 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 | |
| 2. |
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 | |
| 3. |
An IC 7840 regulator has an output current =180mA and internal resistor =10 . Find the collector current in the output using the transistor specification: =15 and VEB(ON) =1.5v. |
| A. | 270mA |
| B. | 450mA |
| C. | 100mA |
| D. | 50mA |
| Answer» C. 100mA | |
| 4. |
The change in output voltage for the corresponding change in load current in a 7805 IC regulator is defined as |
| A. | All of the mentioned |
| B. | Line regulation |
| C. | Load regulation |
| D. | Input regulation |
| Answer» D. Input regulation | |
| 5. |
Find the difference between output current having a load of 100 and 120 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 | |