MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Where does degeneration take place in a self alpha cutoff frequency? |
| A. | Across R<sub>B</sub> |
| B. | Across R<sub>E</sub> |
| C. | No degeneration occurs |
| D. | Across R<sub>C</sub> |
| Answer» C. No degeneration occurs | |
| 2. |
Collector base feedback and emitter feedback combined together provide stability for self alpha cutoff frequency. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
What is the stability factor if RE = 8k and RTH = 11k during alpha cutoff frequency? |
| A. | 1.335 |
| B. | 2.375 |
| C. | 1.727 |
| D. | 0.272 |
| Answer» C. 1.727 | |
| 4. |
What values of VBE and would provide maximum stability? |
| A. | V<sub>BE</sub> = 5V, = 50 |
| B. | V<sub>BE</sub> = 4V, = 100 |
| C. | V<sub>BE</sub> = 4.5V, = 50 |
| D. | It is irrelevant |
| Answer» E. | |
| 5. |
In an ideal stable self alpha cutoff frequency, what should be the current IBwith respect to IC? |
| A. | I<sub>B</sub> should be 20% of I<sub>C</sub> |
| B. | I<sub>B</sub> should be 5% of I<sub>C</sub> |
| C. | I<sub>B</sub> should be 10% of I<sub>C</sub> |
| D. | I<sub>B</sub> should be 50% of I<sub>C</sub> |
| Answer» D. I<sub>B</sub> should be 50% of I<sub>C</sub> | |
| 6. |
Why is it essential to stabilize the operating point of a circuit? |
| A. | Thermal runaway, power efficiency, individual variations |
| B. | Temperature dependency of I<sub>B</sub>, individual variations, power efficiency |
| C. | Thermal runaway, Temperature dependency of I<sub>C</sub>, individual variations |
| D. | Temperature dependency of I<sub>C</sub>, thermal runaway, cost efficiency |
| Answer» D. Temperature dependency of I<sub>C</sub>, thermal runaway, cost efficiency | |
| 7. |
Why do we require RE for a good stable alpha cutoff frequency? |
| A. | To obtain a current I<sub>E</sub> sensitive to and V<sub>BE</sub> |
| B. | To obtain a current I<sub>B</sub> sensitive to and V<sub>BE</sub> |
| C. | To obtain a current I<sub>E</sub> insensitive to and V<sub>BE</sub> |
| D. | To obtain a current I<sub>B</sub> insensitive to and V<sub>BE</sub> |
| Answer» D. To obtain a current I<sub>B</sub> insensitive to and V<sub>BE</sub> | |
| 8. |
How many main types of alpha cutoff frequency are there in bipolar transistors? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» D. 6 | |
| 9. |
What is the function of an alpha cutoff frequency? |
| A. | To simplify the circuit |
| B. | To provide a non linear output |
| C. | To optimize the power |
| D. | To provide steady current or voltage |
| Answer» E. | |