MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A person riding on a merry-go round emits a sound wave of a certain frequency. Will the person at centre observe Doppler Effect. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 2. |
When can sound be heard over long distances? |
| A. | On a sunny day |
| B. | On a humid day |
| C. | When snowing |
| D. | On a rainy day |
| Answer» E. | |
| 3. |
The sound of a bomb explosion travels faster than the sound produced by a humming bee. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
The speed of sound in moist air is greater than that in dry air. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
What will be the velocity of sound in a perfectly rigid rod? |
| A. | Infinity |
| B. | Finite |
| C. | Zero |
| D. | Constant |
| Answer» B. Finite | |
| 6. |
In which of the following is the Doppler Effect symmetric? |
| A. | Water |
| B. | Air |
| C. | Liquid |
| D. | Light |
| Answer» E. | |
| 7. |
When a train, blowing its whistle, approaches him, the pitch of the whistle appears to rise and it appears to drop as the engine moves away from him. What is the effect observed here? |
| A. | Doppler effect |
| B. | Frequency effect |
| C. | Beats |
| D. | Echelon effect |
| Answer» B. Frequency effect | |
| 8. |
A tuning fork produces 4 beats/s when sounded with a tuning fork of frequency 512Hz. The same tuning fork, when sounded with a another tuning fork of frequency 514Hz, produces 6 beats/s. Find the frequency of the tuning fork. |
| A. | 500Hz |
| B. | 1000Hz |
| C. | 128Hz |
| D. | 508Hz |
| Answer» E. | |
| 9. |
Frequency is used for tuning musical instruments. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
Calculate the intensity level of a plane just leaving the runway having sound intensity of about 1000W/m2. |
| A. | 0dB |
| B. | 15dB |
| C. | 5dB |
| D. | 150dB |
| Answer» E. | |
| 11. |
The intensity of sound produced by roaring of a lion at a distance of 5m is 0.01W/m2. Calculate the intensity level in decibel. |
| A. | 1dB |
| B. | 11dB |
| C. | 100dB |
| D. | 20dB |
| Answer» D. 20dB | |
| 12. |
The volume of an auditorium is 12,000m3. Its reverberation time is 1.5 seconds. If the average absorption coefficient of interior surfaces is 0.4 Sabine/m2. Find the area of interior surfaces. |
| A. | 20,000m<sup>2</sup> |
| B. | 3340m<sup>2</sup> |
| C. | 4500m<sup>2</sup> |
| D. | 450m<sup>2</sup> |
| Answer» C. 4500m<sup>2</sup> | |