MCQOPTIONS
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MCQOPTIONS
This section includes 40 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency? |
| A. | 1/4f |
| B. | 1/2f |
| C. | Frequency lower than 20 Hz |
| D. | 2f |
| Answer» D. 2f | |
| 2. |
A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe |
| A. | Always an node in formed |
| B. | Always an antinode is formed |
| C. | Neither node nor antinode is formed |
| D. | Sometimes a node and sometimes an antinode is formed |
| Answer» B. Always an antinode is formed | |
| 3. |
According to Newton sound travel in air under the conditions of |
| A. | Adiabatic |
| B. | Isothermal |
| C. | Isobaric |
| D. | Isochoric |
| Answer» D. Isochoric | |
| 4. |
Beats are the results of |
| A. | Diffraction of sound waves |
| B. | Constructive and destructive interference |
| C. | Polarization |
| D. | Destructive interference |
| Answer» C. Polarization | |
| 5. |
Doppler effect applies to |
| A. | Sound wave only |
| B. | Light wave only |
| C. | Both sound and light waves |
| D. | Neither sound nor light wave |
| Answer» D. Neither sound nor light wave | |
| 6. |
For destructive interference of sound waves the path difference between two interfering sounds should be |
| A. | N? |
| B. | (n+1/2)? |
| C. | Some time n? and some times (n+1/2)? |
| D. | None of these |
| Answer» C. Some time n? and some times (n+1/2)? | |
| 7. |
Fundamental frequency of stationary waves in open pipe is ________ times the frequency in closed pipe. |
| A. | One |
| B. | Two |
| C. | Four time |
| D. | None of these |
| Answer» C. Four time | |
| 8. |
The waves that require a material medium for their propagation are called |
| A. | Matter waves |
| B. | Electromagnetic waves |
| C. | Carrier waves |
| D. | Mechanical waves |
| Answer» E. | |
| 9. |
Ultrasonic have |
| A. | Frequency in the audible range |
| B. | Frequency is greater than 20 kHz |
| C. | Frequency lower than 20 Hz |
| D. | All of above |
| Answer» C. Frequency lower than 20 Hz | |
| 10. |
Velocity of sound in vacuum is |
| A. | 332 ms-1 |
| B. | 320 ms-1 |
| C. | Zero |
| D. | 224 ms-1 |
| Answer» D. 224 ms-1 | |
| 11. |
Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are |
| A. | Longitudinal |
| B. | Transverse |
| C. | Periodic |
| D. | Both (a) and (c) |
| Answer» E. | |
| 12. |
Waves transmit __________________ from one place to another |
| A. | Energy |
| B. | Mass |
| C. | Both |
| D. | None |
| Answer» B. Mass | |
| 13. |
When the source of sound moves away form a stationary listener then _________ occurs. |
| A. | An apparent increase in frequency |
| B. | An apparent decrease in frequency |
| C. | An apparent decrease in wavelength |
| D. | No apparent change in frequency |
| Answer» C. An apparent decrease in wavelength | |
| 14. |
When two identical traveling waves are superimposed, the velocity of the resultant wave |
| A. | Decreases |
| B. | Increases |
| C. | Remains unchanged |
| D. | Becomes zero |
| Answer» D. Becomes zero | |
| 15. |
Which one is the correct relation for fundamental frequency of open and closed pipe? |
| A. | Fopen = 2 fclosed |
| B. | Fclosed = 2fopen |
| C. | Fopen = fclosed |
| D. | Fopen = 1 / f closed |
| Answer» B. Fclosed = 2fopen | |
| 16. |
Which one is the correct relation? |
| A. | VNewton = V Laplace |
| B. | VNewton = |
| C. | VNewton = |
| D. | VNewton = |
| Answer» D. VNewton = | |
| 17. |
Silence zone takes place due to |
| A. | Constructive interference |
| B. | Destructive interference |
| C. | Beats |
| D. | Resonance |
| Answer» C. Beats | |
| 18. |
Sound waves do not travel in vacuum because |
| A. | They are transverse waves |
| B. | They are stationary waves |
| C. | They require material medium for propagation |
| D. | They do not have enough energy |
| Answer» D. They do not have enough energy | |
| 19. |
The beats frequency (sensible) for a human car is |
| A. | 42Hz |
| B. | 7 Hz |
| C. | 256Hz |
| D. | 262Hz |
| Answer» C. 256Hz | |
| 20. |
The dimension of elastic modulus ? is |
| A. | ML-1T-2 |
| B. | ML-2T-2 |
| C. | MLT-2 |
| D. | ML2T-2 |
| Answer» B. ML-2T-2 | |
| 21. |
The distance between any two consecutive crests or troughs is called |
| A. | Frequency |
| B. | Period |
| C. | Wave length |
| D. | Phase difference |
| Answer» D. Phase difference | |
| 22. |
The distance between consecutive node and anitnode is |
| A. | ? |
| B. | ?/2 |
| C. | 2? |
| D. | ?/4 |
| Answer» E. | |
| 23. |
The distance between two consecutive nodes is |
| A. | ?/2 |
| B. | ?/4 |
| C. | ? |
| D. | 2? |
| Answer» B. ?/4 | |
| 24. |
The number of beats produced per second is equal to |
| A. | The sum of the frequencies of two tuning forks |
| B. | The difference of the frequencies of two tuning forks |
| C. | The ratio of the frequencies of two tuning forks |
| D. | The frequency of either of the two tuning forks |
| Answer» C. The ratio of the frequencies of two tuning forks | |
| 25. |
The normal ear is the most sensitive in the frequency range |
| A. | 20000 to 30000 hertz |
| B. | 10 to 20 hertz |
| C. | 2000 to 4000 hertz |
| D. | 6000 to 8000 hertz |
| Answer» D. 6000 to 8000 hertz | |
| 26. |
The particles in the wave separated through __________ multiple of ? are out of phase to each other |
| A. | (n) |
| B. | (n+1) |
| C. | (n+1/2) |
| D. | Both (a) and (c) |
| Answer» D. Both (a) and (c) | |
| 27. |
The periodic alternation of sound between maximum and minimum loudness are called |
| A. | Silence zone |
| B. | Interference |
| C. | Beats |
| D. | Resonance |
| Answer» D. Resonance | |
| 28. |
The speed of sound in hydrogen is __________ time than that in oxygen |
| A. | Two times |
| B. | Three times |
| C. | Four time |
| D. | Six time |
| Answer» D. Six time | |
| 29. |
The speed of stationary waves in a stretched string are independent of |
| A. | Number of loops |
| B. | Tension in the string |
| C. | Point where string is plucked |
| D. | Both (a) and (c) |
| Answer» E. | |
| 30. |
The velocity of sound in air would become double than its velocity at 0?C at temperature |
| A. | 313?C |
| B. | 586?C |
| C. | 819?C |
| D. | 1172?C |
| Answer» D. 1172?C | |
| 31. |
The velocity of sound is greatest in |
| A. | Water |
| B. | Air |
| C. | Copper |
| D. | Ammonia |
| Answer» D. Ammonia | |
| 32. |
Which phenomena can be applied to estimate the velocity of star with respect to earth |
| A. | Dopplers effect |
| B. | Interference of waves |
| C. | Beats phenomena |
| D. | All of these |
| Answer» B. Interference of waves | |
| 33. |
If stretching force T of wire increases, then its frequency |
| A. | Decreases |
| B. | Increases |
| C. | Remains the same |
| D. | Any of above |
| Answer» C. Remains the same | |
| 34. |
In open organ pipe |
| A. | Only even harmonics are present |
| B. | Only odd harmonics are present |
| C. | Both even and odd harmonics are present |
| D. | Selected harmonics are present |
| Answer» D. Selected harmonics are present | |
| 35. |
In vibrating cord the points where the amplitude is maximum, are called |
| A. | Antinodes |
| B. | Nodes |
| C. | Troughs |
| D. | Crests |
| Answer» B. Nodes | |
| 36. |
Increase in velocity of sound in the air for 1 ?C rise in temperature is |
| A. | 1.61 ms-1 |
| B. | 61.0 ms-1 |
| C. | 0.61 ms-1 |
| D. | 2.00 ms-1 |
| Answer» D. 2.00 ms-1 | |
| 37. |
It is possible to distinguish between transverse and longitudinal waves form the property of |
| A. | Refraction |
| B. | Polarization |
| C. | Interference |
| D. | Diffraction |
| Answer» C. Interference | |
| 38. |
Laplace found that the alternate compressions and rarefactions produced in sound waves follows |
| A. | Isothermal law |
| B. | Adiabatic law |
| C. | Isochoric law |
| D. | All of the above |
| Answer» C. Isochoric law | |
| 39. |
Newton estimated the speed of sound |
| A. | 281m/sec |
| B. | 333m/sec |
| C. | 340m/sec |
| D. | All of the above |
| Answer» B. 333m/sec | |
| 40. |
On loading the prong of a tuning form with wax its frequency |
| A. | Increases |
| B. | Decreases |
| C. | Remains unchanged |
| D. | May increase or decrease |
| Answer» C. Remains unchanged | |