MCQOPTIONS
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MCQOPTIONS
This section includes 14 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. |
Gain of an amplifier usually expressed in db because _______________ |
| A. | It is a small unit |
| B. | Calculations become easy |
| C. | Human ear response is logarithmic |
| D. | Gain is reduced |
| Answer» D. Gain is reduced | |
| 2. |
Which transformer is used for impedance matching in transistor coupled amplifier? |
| A. | step-up |
| B. | step-down |
| C. | same turn ratio |
| D. | different turn ratio |
| Answer» C. same turn ratio | |
| 3. |
For extremely low frequencies, RC coupling is not used because of ___________ |
| A. | There is considerable power loss |
| B. | There is a hum in the output |
| C. | Electrical size of the coupling capacitor |
| D. | Low efficiency |
| Answer» D. Low efficiency | |
| 4. |
WHICH_TRANSFORMER_IS_USED_FOR_IMPEDANCE_MATCHING_IN_TRANSISTOR_COUPLED_AMPLIFIER??$ |
| A. | step-up |
| B. | step-down |
| C. | same turn ratio |
| D. | different turn ratio |
| Answer» C. same turn ratio | |
| 5. |
The total gain of a multistage amplifier is less than the product of the gains of individual stages due to ___________$ |
| A. | Power loss in the coupling device |
| B. | Loading effect of the next stage |
| C. | The use of many transistors |
| D. | The use of many capacitors |
| Answer» C. The use of many transistors | |
| 6. |
Gain of an amplifier usually expressed in db because _______________$ |
| A. | It is a small unit |
| B. | Calculations become easy |
| C. | Human ear response is logarithmic |
| D. | Gain is reduced |
| Answer» D. Gain is reduced | |
| 7. |
For extremely low frequencies, RC coupling is not used because of __________? |
| A. | There is considerable power loss |
| B. | There is a hum in the output |
| C. | Electrical size of the coupling capacitor |
| D. | Low efficiency |
| Answer» D. Low efficiency | |
| 8. |
If a three stage amplifier has individual stage gains of 10db, 6db and 15db; then the total gain in db is ______ |
| A. | 600db |
| B. | 24db |
| C. | 14db |
| D. | 31db |
| Answer» E. | |
| 9. |
The voltage gain is practically expressed in _______ |
| A. | db |
| B. | volts |
| C. | as a number |
| D. | ampere |
| Answer» B. volts | |
| 10. |
Which of the following is an advantage of RC coupling scheme? |
| A. | Good impedance matching |
| B. | Economy |
| C. | High efficiency |
| D. | Frequency response |
| Answer» C. High efficiency | |
| 11. |
A radio receiver has how many stages of amplification? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | More than one |
| Answer» E. | |
| 12. |
Why is RC coupling confined to low power applications? |
| A. | Due to large value of coupling capacitor |
| B. | Low efficiency |
| C. | Large number of components |
| D. | Due to is frequency response |
| Answer» C. Large number of components | |
| 13. |
What is the purpose of RC or transformer coupling? |
| A. | To block a.c. |
| B. | To separate bias of one stage from another |
| C. | Increase thermal stability |
| D. | Increase Efficiency |
| Answer» C. Increase thermal stability | |
| 14. |
The frequency response of transformer coupling is ________ |
| A. | Good |
| B. | Very Good |
| C. | Excellent |
| D. | Poor |
| Answer» E. | |