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. |
What are the disadvantages of collector emitter feedback bias circuits? |
| A. | Requires few resistors |
| B. | Provides a lot of stability |
| C. | Provides negative feedback |
| D. | Provides positive feedback |
| Answer» D. Provides positive feedback | |
| 2. |
How does the negative feedback help a collector emitter feedback circuit? |
| A. | Helps make it more predictable |
| B. | Provides opposing change in base voltage |
| C. | Helps make it more predictable, provides opposing change in base voltage |
| D. | It doesn’t affect |
| Answer» D. It doesn’t affect | |
| 3. |
How do you calculate the value of VCE ? |
| A. | VCE = VCC + VC (RC + RE) |
| B. | VCE = VCC – VC (RC + RE) |
| C. | VCE = VCC – VC (RB + RE) |
| D. | VCE = VCC + VC (RB + RE) |
| Answer» C. VCE = VCC – VC (RB + RE) | |
| 4. |
In the circuit given below, assume VCC = 12V, VBE = 0.7V, RB = 330kΩ, RC = 3.3kΩ, RE = 2.7kΩ and β = 50. What is the base current IB? |
| A. | 16.432µA |
| B. | 17.856µA |
| C. | 20.542µA |
| D. | 17.936µA |
| Answer» E. | |
| 5. |
How does emitter resistor RE provides stability? |
| A. | Consumes less power |
| B. | Has an easier circuit design |
| C. | Automatically biases the circuit |
| D. | It does not provide stability |
| Answer» D. It does not provide stability | |
| 6. |
Why is collector emitter feedback better for linear circuits? |
| A. | Independent of β |
| B. | Dependent on β |
| C. | Highly predictable |
| D. | Not stable |
| Answer» C. Highly predictable | |
| 7. |
What happens if collector current increases in a collector emitter feedback circuit? |
| A. | Emitter voltage increases therefore base voltage increases |
| B. | Emitter voltage decreases therefore base voltage decreases |
| C. | Emitter voltage increases therefore base voltage decreases |
| D. | Emitter voltage decreases therefore base voltage increases |
| Answer» B. Emitter voltage decreases therefore base voltage decreases | |
| 8. |
In the circuit given below, assume VCC = 5V, VBE = 0.7V, RE = 10kΩ, RB = 20kΩ and β = 50. How much is the current IE? |
| A. | 0.561mA |
| B. | 0.335mA |
| C. | 0.413mA |
| D. | 0.513mA |
| Answer» D. 0.513mA | |
| 9. |
What is the function of RE in the collector emitter feedback circuit? |
| A. | To improve stability and decrease positive feedback |
| B. | To improve stability and increase positive feedback |
| C. | To improve stability and decrease negative feedback |
| D. | To improve stability and increase negative feedback |
| Answer» E. | |
| 10. |
Why do we need collector emitter feedback bias? |
| A. | To provide a non – linear output |
| B. | To maintain transistor in active region |
| C. | To maintain transistor in saturation region |
| D. | To maintain transistor in cut – off region |
| Answer» C. To maintain transistor in saturation region | |