MCQOPTIONS
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MCQOPTIONS
This section includes 10 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 silicon NPN transistor is used and it has a large value of β. Find the required value of R2 when IC=1mA. |
| A. | 10kΩ |
| B. | 20kΩ |
| C. | 30kΩ |
| D. | 40kΩ |
| Answer» E. | |
| 2. |
In the circuit, the transistor has a large β value (VBE=0.7V). Find the current through RC. |
| A. | 0.5mA |
| B. | 2mA |
| C. | 1mA |
| D. | 1.6mA |
| Answer» D. 1.6mA | |
| 3. |
What is the Thevenin’s resistance (RTH) in a self bias shown below? |
| A. | R1R2/R1+R2 |
| B. | R2/R1+R2 |
| C. | R1R2/R1-R2 |
| D. | R1/R1-R2 |
| Answer» B. R2/R1+R2 | |
| 4. |
What is the Thevenin’s voltage (VTH) in a self bias shown below? |
| A. | VCCR2/R1+R2 |
| B. | VCCR1/R1+R2 |
| C. | VCCR2/R1-R2 |
| D. | VCCR2/R1-R2 |
| Answer» B. VCCR1/R1+R2 | |
| 5. |
The collector to emitter voltage (VCE) is obtained by_________ |
| A. | VCC – RCIC+RBIB |
| B. | VCC – RCIC-REIE |
| C. | VCC + RCIC |
| D. | VCC + RCIB |
| Answer» C. VCC + RCIC | |
| 6. |
The collector current (IC) that is obtained in a self biased transistor is_________ |
| A. | (VTH – VBE)/RE |
| B. | (VTH + VBE)/RE |
| C. | (VTH – VBE)/RE |
| D. | (VTH + VBE)/RE |
| Answer» B. (VTH + VBE)/RE | |
| 7. |
The_value_of_αac_for_all_practical_purposes,_for_commercial_transistors_range_from_________$# |
| A. | 0.5 to 0.6 |
| B. | 0.7 to 0.77 |
| C. | 0.8 to 0.88 |
| D. | 0.9 to 0.99 |
| Answer» E. | |
| 8. |
The stability factor for a self biased transistor is_________ |
| A. | 1 – R<sub>TH</sub>/R<sub>E</sub> |
| B. | 1 + R<sub>TH</sub>/R<sub>E</sub> |
| C. | 1 + R<sub>E</sub>/R<sub>TH</sub> |
| D. | 1 – R<sub>E</sub>/R<sub>TH</sub> |
| Answer» C. 1 + R<sub>E</sub>/R<sub>TH</sub> | |
| 9. |
The collector to emitter voltage (VCE) is obtained by_________ |
| A. | V<sub>CC</sub> – R<sub>C</sub>I<sub>C</sub>+RBI<sub>B</sub> |
| B. | V<sub>CC</sub> – R<sub>C</sub>I<sub>C</sub>-R<sub>E</sub>I<sub>E</sub> |
| C. | V<sub>CC</sub> + R<sub>C</sub>I<sub>C</sub> |
| D. | V<sub>CC</sub> + R<sub>C</sub>I<sub>B</sub> |
| Answer» C. V<sub>CC</sub> + R<sub>C</sub>I<sub>C</sub> | |
| 10. |
The collector current (IC) that is obtained in a self biased transistor is_________ |
| A. | (V<sub>TH</sub> – V<sub>BE</sub>)/R<sub>E</sub> |
| B. | (V<sub>TH</sub> + V<sub>BE</sub>)/R<sub>E</sub> |
| C. | (V<sub>TH</sub> – V<sub>BE</sub>)/R<sub>E</sub> |
| D. | (V<sub>TH</sub> + V<sub>BE</sub>)/R<sub>E</sub> |
| Answer» B. (V<sub>TH</sub> + V<sub>BE</sub>)/R<sub>E</sub> | |