MCQOPTIONS
Saved Bookmarks
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. |
A source emits a sound of a frequency of 400Hz, but the listener hears it s to be 390Hz. Then? |
| A. | The listener is moving towards the source |
| B. | The source is moving towards the listener |
| C. | The listener is moving away from the source |
| D. | The listener has a defective ear |
| Answer» D. The listener has a defective ear | |
| 2. |
A tuning fork A produces 4beats/s with another tuning fork B of frequency 320Hz. On filing one of the prongs of A, 4beats/s is again heard when sounded with the same fork B. Then, the frequency of the fork A before filing is __________ |
| A. | 328Hz |
| B. | 316Hz |
| C. | 324Hz |
| D. | 320Hz |
| Answer» C. 324Hz | |
| 3. |
Two waves are propagating with the same amplitude and nearly same frequency in opposite direction, they result in __________ |
| A. | Beats |
| B. | Stationary wave |
| C. | Resonance |
| D. | Wave packet |
| Answer» C. Resonance | |
| 4. |
Two waves of wavelength 99cm and 100cm both travelling with velocity 396m/s are made to interfere. The number of beats produced by them per second is? |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» D. 8 | |
| 5. |
Following two wave trains are approaching each other
|
| A. | nThe number of beats heard per second is? |
| B. | 8 |
| C. | 4 |
| D. | 1 |
| E. | Zero |
| Answer» C. 4 | |
| 6. |
An organ pipe, open at both ends produce 5 beats per second when vibrated with a source of frequency 200Hz. The second harmonic of the same pipe produces 10 beats per second with a source of frequency 420 Hz. The frequency of source is? |
| A. | 195Hz |
| B. | 205Hz |
| C. | 190Hz |
| D. | 210Hz |
| Answer» C. 190Hz | |
| 7. |
The velocity of sound in open ended tube in 330m/s, the frequency of a wave is 1.1 kHz and length of the tube is 30cm, then number of harmonics that it will emit is? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 8. |
An open pipe resonates with a tuning fork of frequency 500Hz. It is observed that two successive nodes are formed at distances 16 and 46cm from the open end. The speed of sound in air in the pipe is? |
| A. | 230 m/s |
| B. | 300 m/s |
| C. | 320 m/s |
| D. | 360 m/s |
| Answer» C. 320 m/s | |
| 9. |
In an experiment with sonometer a tuning fork of frequency 256Hz resonates with a length of 25cm and another tuning fork resonates with a length of 16x cm. Tension of the spring remaining constant the frequency of the second tuning fork is? |
| A. | 163.84Hz |
| B. | 400Hz |
| C. | 320Hz |
| D. | 20.4Hz |
| Answer» C. 320Hz | |
| 10. |
When the length of the vibrating segment of a sonometer wire is increased by 1%, the percentage change in its frequency is? |
| A. | 100/101 |
| B. | 99/100 |
| C. | 1 |
| D. | 2 |
| Answer» D. 2 | |