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This section includes 16 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 will happen if a capacitor is connected in parallel with RE in the amplifier design which uses emitter feedback bias circuit? |
A. | No changes |
B. | Gain value increases |
C. | Feedback increases |
D. | Gain value remains the same but feedback doubles |
Answer» C. Feedback increases | |
2. |
In order to make an amplifier which of the following biasing technique is used more? |
A. | Fixed bias |
B. | Self bias |
C. | Collector to base bias |
D. | Emitter feedback bias |
Answer» E. | |
3. |
For an emitter feedback bias Circuit having, RE=1Kohm, RC= 4.7Kohm, IB=0.005mA, IE = 1mA, VCC = 12V and Vce = 5V. Find the value of beta. |
A. | 254 |
B. | 100 |
C. | 1000 |
D. | 500 |
Answer» B. 100 | |
4. |
For an emitter feedback bias circuit, RC is 10Kohm, Re= 5Kohm, RB = 1Kohm, If IC = 1mA, current gain is_________________ |
A. | 4 |
B. | 2 |
C. | 5 |
D. | 6 |
Answer» C. 5 | |
5. |
For an emitter feedback bias circuit, the value of VCC = 10V, RB = 10Kohm, RE=1Kohm and RC=2Kohm, if current flowing through collector is 0.5mA, what is the voltage difference between collector and emitter? |
A. | 8.5V |
B. | 9V |
C. | 10V |
D. | 10.5V |
Answer» B. 9V | |
6. |
For emitter feedback bias, to make IC independent of DC current gain, which of the following condition is required? |
A. | RC >> RB/dc current gain |
B. | RE >> RB/dc current gain |
C. | RB >> RC/dc current gain |
D. | Re >> RC/dc current gain |
Answer» B. RE >> RB/dc current gain | |
7. |
IN_ORDER_TO_MAKE_AN_AMPLIFIER_WHICH_OF_THE_FOLLOWING_BIASING_TECHNIQUE_IS_USED_MORE??$ |
A. | Fixed bias |
B. | Self bias |
C. | Collector to base bias |
D. | Emitter feedback bias |
Answer» E. | |
8. |
What_will_happen_if_a_capacitor_is_connected_in_parallel_with_RE_in_the_amplifier_design_which_uses_emitter_feedback_bias_circuit?$ |
A. | No changes |
B. | Gain value increases |
C. | Feedback increases |
D. | Gain value remains the same but feedback doubles |
Answer» C. Feedback increases | |
9. |
Among the following statements which one is true according to feedback bias? |
A. | Fixed bias is more stable than emitter feedback bias |
B. | Fixed bias produces more feedback than emitter feedback bias |
C. | Emitter feedback bias is more stable than the fixed bias |
D. | Fixed and emitter bias have same stability and feedback |
Answer» D. Fixed and emitter bias have same stability and feedback | |
10. |
Which of the following statement is the main disadvantage of emitter feedback bias? |
A. | Reduces the gain |
B. | Positive feedback |
C. | Design is difficult |
D. | High output impedance |
Answer» B. Positive feedback | |
11. |
For an emitter feedback bias Circuit having, RE=1Kohm, RC= 4.7Kohm, IB=0.005mA, IE = 1mA, VCC = 12V and Vce = 5V. Find the value of beta. |
A. | 254 |
B. | 100 |
C. | 1000 |
D. | 500 |
Answer» B. 100 | |
12. |
What will be the temperature changes effects on the emitter feedback circuit? |
A. | Increases voltage gain |
B. | Increases current gain |
C. | Does not affect the gain |
D. | Decreases both current and voltage gain |
Answer» D. Decreases both current and voltage gain | |
13. |
The feedback helps to maintain a constant gain value. |
A. | True |
B. | False |
Answer» B. False | |
14. |
For an emitter feedback bias circuit, RC is 10Kohm, Re= 5Kohm, RB = 1Kohm, If IC = 1mA, current gain is |
A. | |
B. | 4 |
C. | 2 |
Answer» C. 2 | |
15. |
For an emitter feedback bias circuit, the value of VCC = 10V, RB = 10Kohm, RE=1Kohm and RC=2Kohm, if current flowing through collector is 0.5mA, what is the voltage difference between collector and emitter? |
A. | 8.5V |
B. | 9V |
C. | 10V |
D. | 10.5V |
Answer» B. 9V | |
16. |
For emitter feedback bias, to make IC independent of DC current gain, which of the following condition is required? |
A. | R<sub>C</sub> >> R<sub>B</sub>/dc current gain |
B. | R<sub>E</sub> >> R<sub>B</sub>/dc current gain |
C. | R<sub>B</sub> >> R<sub>C</sub>/dc current gain |
D. | R<sub>e</sub> >> R<sub>C</sub>/dc current gain |
Answer» B. R<sub>E</sub> >> R<sub>B</sub>/dc current gain | |