MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is dBm used to measure in terms of decibels? |
| A. | Peak amplitude of a signal |
| B. | Power relative to 1mW |
| C. | Amplitude of a signal |
| D. | Volume unit |
| Answer» D. Volume unit | |
| 2. |
What is dBTP used to measure in terms of decibels? |
| A. | Peak amplitude of a signal |
| B. | Power relative to 1mW |
| C. | Amplitude of a signal |
| D. | Volume unit |
| Answer» B. Power relative to 1mW | |
| 3. |
The symbols dBA, dBB and dBC are used for to estimated human ear s reaction to sound. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
What is dBFS used to measure in terms of decibels? |
| A. | Peak amplitude of a signal |
| B. | Power relative to 1mW |
| C. | Amplitude of a signal |
| D. | Volume unit |
| Answer» D. Volume unit | |
| 5. |
How is the power ratio corresponding to 12dB change in level? |
| A. | 16.38 |
| B. | 14.24 |
| C. | 15.85 |
| D. | 12.88 |
| Answer» D. 12.88 | |
| 6. |
What is the value of power gain in decibels if Poutput = 250W and Pinput = 100W? |
| A. | 2.48dB |
| B. | 3.98dB |
| C. | 1.78dB |
| D. | 3.54dB |
| Answer» C. 1.78dB | |
| 7. |
What is the value of voltage gain in decibels if Voutput = 20V and Vinput = 15V? |
| A. | 1.75dB |
| B. | 2.28dB |
| C. | 1.37dB |
| D. | 2.48dB |
| Answer» E. | |
| 8. |
What is the corresponding change in level for a factor of 10 change in amplitude? |
| A. | 100dB |
| B. | 20dB |
| C. | 10dB |
| D. | 0.1dB |
| Answer» C. 10dB | |
| 9. |
What is the corresponding change in level for a factor of 10 change in power? |
| A. | 100dB |
| B. | 20dB |
| C. | 10dB |
| D. | 0.1dB |
| Answer» D. 0.1dB | |
| 10. |
What is the symbol of a decibel? |
| A. | dB |
| B. | Db |
| C. | DB |
| D. | db |
| Answer» B. Db | |