MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
50 tuning forks are arranged in increasing order of their frequencies such that each gives 4 beats/sec with its previous tuning fork. If the frequency of the last fork is an octave of the first, then the frequency of the first tuning fork is? |
| A. | 200Hz |
| B. | 204Hz |
| C. | 196Hz |
| D. | 0 |
| Answer» D. 0 | |
| 2. |
Pressure variation of a mechanical wave depends upon ___________ |
| A. | Intensity |
| B. | Independent of intensity |
| C. | 1/Intensity |
| D. | Intensity<sup>2</sup> |
| Answer» D. Intensity<sup>2</sup> | |
| 3. |
Reverberation time can t be controlled by ___________ |
| A. | Temperature |
| B. | Size of window |
| C. | Volume of room |
| D. | Changing carpet |
| Answer» E. | |
| 4. |
Sources of sound and observer are moving towards each other, the observer will hear ___________ |
| A. | High frequency, low wavelength |
| B. | Low frequency, low wavelength |
| C. | High frequency, low wavelength |
| D. | Low frequency, high wavelength |
| Answer» D. Low frequency, high wavelength | |
| 5. |
For beats to be produced ___________ |
| A. | Frequency of sources should be different and amplitude should be the same |
| B. | Frequency of sources should be same and amplitude should be different |
| C. | Frequency of sources should be same and amplitude should be different |
| D. | Frequency of sources should be same and amplitude should be the same |
| Answer» B. Frequency of sources should be same and amplitude should be different | |
| 6. |
The first overtone of a stretched wire of given length is 320Hz. The first harmonic is ___________ |
| A. | 320Hz |
| B. | 160Hz |
| C. | 480Hz |
| D. | 640Hz |
| Answer» C. 480Hz | |
| 7. |
A wave of frequency 100Hz travels along a string towards its fixed end. When this wave travels back, after reflection, a node is formed at a distance of 10cm from the fixed end. The speed of the wave (incident and reflected) is? |
| A. | 5m/s |
| B. | 20m/s |
| C. | 10m/s |
| D. | 40m/s |
| Answer» C. 10m/s | |
| 8. |
An underwater sonar source operating at a frequency of 60 kHz directs its beam towards the surface. If velocity of sound in air is 330m/s, wavelength and frequency of the waves in air are ___________ |
| A. | 5.5mm, 60 kHz |
| B. | 5.5mm, 30 kHz |
| C. | 5.5mm, 30 kHz |
| D. | 5.5mm, 80 kHz |
| Answer» B. 5.5mm, 30 kHz | |
| 9. |
The speed of a wave in a medium is 760m/s. If 3600 waves are passing through a point in the medium in 2 min, then its wavelength is? |
| A. | 13.8m |
| B. | 41.5m |
| C. | 25.3m |
| D. | 57.2m |
| Answer» D. 57.2m | |
| 10. |
At what temperature, the speed of sound in the air will become double of its value at 27 C? |
| A. | 54 C |
| B. | 627 C |
| C. | 327 C |
| D. | 927 C |
| Answer» E. | |