MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
Q. What should be the gain of an amplifier at 20 kHz if the half power frequencies are fL = 20 Hz and fH = 15 kHz along with mid band gain = 80? |
| A. | 22.76 |
| B. | 45.09 |
| C. | 40.08 |
| D. | 48.07 |
| Answer» E. | |
| 2. |
The configuration in which output impedance of transistor amplifier is highest is ___________ |
| A. | common collector |
| B. | common base |
| C. | common emitter |
| D. | common collector and base |
| Answer» C. common emitter | |
| 3. |
The configuration in which input impedance of transistor amplifier is lowest is ___________ |
| A. | common collector |
| B. | common emitter |
| C. | common base |
| D. | common emitter & base |
| Answer» D. common emitter & base | |
| 4. |
The configuration in which current gain of transistor amplifier is lowest is ___________ |
| A. | common collector |
| B. | common base |
| C. | common emitter |
| D. | common emitter & base |
| Answer» C. common emitter | |
| 5. |
THE_CONFIGURATION_IN_WHICH_INPUT_IMPEDANCE_OF_TRANSISTOR_AMPLIFIER_IS_LOWEST_IS____________?$ |
| A. | common collector |
| B. | common emitter |
| C. | common base |
| D. | common emitter & base |
| Answer» D. common emitter & base | |
| 6. |
Q. What should be the gain of an amplifier at 20 kHz if the half power frequencies are fL = 20 Hz and fH = 15 kHz along with mid band gain = 80?$ |
| A. | 22.76 |
| B. | 45.09 |
| C. | 40.08 |
| D. | 48.07 |
| Answer» E. | |
| 7. |
The configuration in which output impedance of transistor amplifier is highest is ___________$ |
| A. | common collector |
| B. | common base |
| C. | common emitter |
| D. | common collector and base |
| Answer» C. common emitter | |
| 8. |
The configuration in which current gain of transistor amplifier is lowest is __________? |
| A. | common collector |
| B. | common base |
| C. | common emitter |
| D. | common emitter & base |
| Answer» C. common emitter | |
| 9. |
The configuration in which voltage gain of transistor amplifier is lowest is ____________ |
| A. | common collector |
| B. | common emitter |
| C. | common base |
| D. | common emitter & base |
| Answer» B. common emitter | |
| 10. |
Which capacitor is used to block DC portion by allowing to pass only AC portion of the amplified signal to load? |
| A. | Input Coupling Capacitor |
| B. | Bypass Capacitor |
| C. | Output Coupling Capacitor |
| D. | Both coupling and bypass capacitor |
| Answer» D. Both coupling and bypass capacitor | |
| 11. |
What is the phase-shift between input and output voltages of CE amplifier? |
| A. | 90° |
| B. | 120° |
| C. | 180° |
| D. | 270° |
| Answer» D. 270¬¨¬®‚Äö√†√ª | |
| 12. |
Which among the below assertions is not a relevant property of CE amplifier? |
| A. | High voltage gain |
| B. | High current gain |
| C. | High input resistance |
| D. | High output resistance |
| Answer» E. | |
| 13. |
What should be the level of input resistance to allow the occurrence of source loading in common base amplifier configuration? |
| A. | low |
| B. | high |
| C. | moderate |
| D. | stale |
| Answer» B. high | |
| 14. |
Why is the Darlington configuration not suitable for more than two transistors? |
| A. | Because leakage current increases and voltage gain decreases with multiple numbers of transistors |
| B. | Because leakage current decreases and voltage gain increases with multiple numbers of transistors |
| C. | Because leakage current as well as voltage gain increases with multiple numbers of transistors |
| D. | Because leakage current as well as voltage gain decreases with multiple numbers of transistors |
| Answer» B. Because leakage current decreases and voltage gain increases with multiple numbers of transistors | |
| 15. |
Which type of amplifiers exhibits the current gain approximately equal to unity without any current amplification? |
| A. | CE |
| B. | CB |
| C. | CC |
| D. | Cascade |
| Answer» C. CC | |