MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A voltage-follower amplifier comes to you for service. You find the voltage gain to be 5.5 and the input impedance 22 k. The probable fault in this amplifier, if any, is |
| A. | the gain is too low for this type of amplifier. |
| B. | the input impedance is too high for this amplifier. |
| C. | nothing is wrong. The trouble must be somewhere else. |
| D. | none of these. |
| Answer» E. | |
| 2. |
Calculate the overall voltage gain of the circuit if R = 100 and R = 1 k. |
| A. | –1 |
| B. | –10 |
| C. | 11 |
| D. | 9 |
| Answer» D. 9 | |
| 3. |
An inverting amplifier has an input impedance equal to the feedback resistor R. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Calculate the output voltage if R = R = R = 100 , R = 1 k, and V = V = V = 50 mV. |
| A. | –1.5 V |
| B. | 1.5 V |
| C. | 0.5 V |
| D. | –0.5 V |
| Answer» B. 1.5 V | |
| 5. |
If R = R, the voltage gain is ________. |
| A. | 1 |
| B. | –1 |
| C. | 10 |
| D. | very small |
| Answer» C. 10 | |
| 6. |
An RC network has R = 47 k and C = 0.22 F. What is the cutoff frequency? |
| A. | 154 Hz |
| B. | 1540 Hz |
| C. | 1.54 Hz |
| D. | 15.4 Hz |
| Answer» E. | |
| 7. |
Calculate the output impedance of an inverting op-amp using the 741 op-amp (r = 75 , A = 200 V/mV) if R = 100 and R = 1 k. |
| A. | 0.011 |
| B. | 0.00375 |
| C. | 0.0375 |
| D. | 0.375 |
| Answer» C. 0.0375 | |
| 8. |
The input offset voltage drift is a parameter directly related to V and ________. |
| A. | I |
| B. | power dissipation |
| C. | temperature |
| D. | phase shift |
| Answer» D. phase shift | |
| 9. |
An RC network has R = 500 k and C = 10 pF. Find the value of f. |
| A. | 31831 Hz |
| B. | 31.831 kHz |
| C. | 0.031831 MHz |
| D. | all of the above |
| E. | none of the above |
| Answer» E. none of the above | |
| 10. |
Calculate the overall voltage gain of the circuit if R = 100 and R= 1 k. |
| A. | –1 |
| B. | –10 |
| C. | 11 |
| D. | 9 |
| Answer» C. 11 | |
| 11. |
A(n) ________ amplifier configuration has an input impedance approximately equal to the input resistor R and an output impedance approximately equal to the output impedance of the op-amp itself. |
| A. | non-inverting |
| B. | inverting |
| C. | voltage-follower |
| Answer» C. voltage-follower | |
| 12. |
Calculate the input voltage if R = 100 , R = 1 k, and V = 550 mV. |
| A. | –50 mV |
| B. | –5 mV |
| C. | 550 mV |
| D. | 50 mV |
| Answer» E. | |