MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 22 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. |
Wave has simple harmonic motion whose period is 4seconds while another wave which also possesses simple harmonic motion has its period 3sec. If both are combined, then the resultant wave will have the period equal to ___________ |
| A. | 4sec |
| B. | 5sec |
| C. | 12sec |
| D. | 3sec |
| Answer» D. 3sec | |
| 2. |
In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.107sec. The frequency of wave is? |
| A. | 0.73Hz |
| B. | 0.36Hz |
| C. | 1.47Hz |
| D. | 2.94Hz |
| Answer» D. 2.94Hz | |
| 3. |
The apparent frequency in Doppler’s effect does not depend upon ___________ |
| A. | Speed of the observer |
| B. | Distance between the observer and source |
| C. | Speed of the source |
| D. | Frequency of the source |
| Answer» C. Speed of the source | |
| 4. |
When sound travels from air to water, which parameter does not change? |
| A. | Wavelength |
| B. | Frequency |
| C. | Velocity |
| D. | Temperature |
| Answer» C. Velocity | |
| 5. |
Velocity of sound in air is ___________ |
| A. | Faster in dry air than in moist air |
| B. | Directly proportional to temperature |
| C. | Directly proportional to pressure |
| D. | Slower in dry air than in moist air |
| Answer» C. Directly proportional to pressure | |
| 6. |
Lights can travel in a vacuum but not sound, because ______________ |
| A. | Speed of sound is very slow than light |
| B. | Light waves are electromagnetic in nature |
| C. | Sound waves are electromagnetic in nature |
| D. | Light waves are not electromagnetic in nature |
| Answer» B. Light waves are electromagnetic in nature | |
| 7. |
A vehicle, with a horn of frequency n is moving with a velocity of 30m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n+n1. Then (if the sound velocity in air is 300m/s) |
| A. | n1=0.1n |
| B. | n1=0 |
| C. | n1=10n |
| D. | n1=-0.1n |
| Answer» C. n1=10n | |
| 8. |
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. | 20m/s |
| B. | 40m/s |
| C. | 5m/s |
| D. | is?a) 20m/sb) 40m/sc) 5m/sd) 10m/s |
| Answer» B. 40m/s | |
| 9. |
Statement: When two vibration tuning forks having frequencies 256Hz and 512Hz are held near each other, beats cannot be heard.Reason: The principle of superposition is valid if the frequencies of the oscillators are nearly equal. |
| A. | Both statement and reason are true and the reason is the correct explanation of the statement |
| B. | Both statement and reason are true but the reason is not the correct explanation of the statement |
| C. | Statement is true but the reason is false |
| D. | Both statement and reason are false |
| Answer» D. Both statement and reason are false | |
| 10. |
Statement: When a beetle moves along the sand within a few tens of centimetres of a sand scorpion, the scorpion immediately turns towards the beetle and dashes towards it.Reason: When a beetle disturbs the sand, it sends pulses is longitudinal, while the other set in transverse. |
| A. | Both statement and reason are true and the reason is the correct explanation of the statement |
| B. | Both statement and reason are true but the reason is not the correct explanation of the statement |
| C. | Statement is true but the reason is false |
| D. | Both statement and reason are false |
| Answer» B. Both statement and reason are true but the reason is not the correct explanation of the statement | |
| 11. |
Statement: Ocean waves hitting a beach are always found to be nearly normal to the shore.Reason: Once waves hitting a beach are assumed to be plane waves. |
| A. | Both statement and reason are true and the reason is the correct explanation of the statement |
| B. | Both statement and reason are true but the reason is not the correct explanation of the statement |
| C. | Statement is true but the reason is false |
| D. | Both statement and reason are false |
| Answer» B. Both statement and reason are true but the reason is not the correct explanation of the statement | |
| 12. |
THE_APPARENT_FREQUENCY_IN_DOPPLER‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_EFFECT_DOES_NOT_DEPEND_UPON?$# |
| A. | Speed of the observer |
| B. | Distance between the observer and source |
| C. | Speed of the source |
| D. | Frequency of the source |
| Answer» C. Speed of the source | |
| 13. |
Wave has simple harmonic motion whose period is 4seconds while another wave which also possesses simple harmonic motion has its period 3sec. If both are combined, then the resultant wave will have the period equal to |
| A. | 4sec |
| B. | 5sec |
| C. | 12sec |
| D. | 3sec |
| Answer» D. 3sec | |
| 14. |
In a sinusoidal wave, the time required for a particular point to move from maximum displacement to zero displacement is 0.107sec. The frequency of wave is$ |
| A. | 0.73Hz |
| B. | 0.36Hz |
| C. | 1.47Hz |
| D. | 2.94Hz |
| Answer» D. 2.94Hz | |
| 15. |
When sound travels from air to water, which parameter does not change? |
| A. | Wavelength |
| B. | Frequency |
| C. | Velocity |
| D. | Temperature |
| Answer» B. Frequency | |
| 16. |
Velocity of sound in air is |
| A. | Faster in dry air than in moist air |
| B. | Directly proportional to temperature |
| C. | Directly proportional to pressure |
| D. | Slower in dry air than in moist air |
| Answer» C. Directly proportional to pressure | |
| 17. |
Lights can travel in a vacuum but not sound, because |
| A. | Speed of sound is very slow than light |
| B. | Light waves are electromagnetic in nature |
| C. | Sound waves are electromagnetic in nature |
| D. | Light waves are not electromagnetic in nature |
| Answer» B. Light waves are electromagnetic in nature | |
| 18. |
A vehicle, with a horn of frequency n is moving with a velocity of 30m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency n+n1. Then (if the sound velocity in air is 300m/s) |
| A. | n<sub>1</sub>=0.1n |
| B. | n<sub>1</sub>=0 |
| C. | n<sub>1</sub>=10n |
| D. | n<sub>1</sub>=-0.1n |
| Answer» C. n<sub>1</sub>=10n | |
| 19. |
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. | 20m/s |
| B. | 40m/s |
| C. | 5m/s |
| D. | 10m/s |
| Answer» B. 40m/s | |
| 20. |
Statement: When two vibration tuning forks having frequencies 256Hz and 512Hz are held near each other, beats cannot be heard |
| A. | None of these |
| B. | Both statement and reason are true and the reason is the correct explanation of the statement |
| C. | Both statement and reason are true but the reason is not the correct explanation of the statement |
| Answer» D. | |
| 21. |
Statement: When a beetle moves along the sand within a few tens of centimetres of a sand scorpion, the scorpion immediately turns towards the beetle and dashes towards it |
| A. | |
| B. | Both statement and reason are true and the reason is the correct explanation of the statement |
| C. | Both statement and reason are true but the reason is not the correct explanation of the statement |
| Answer» B. Both statement and reason are true and the reason is the correct explanation of the statement | |
| 22. |
Statement: Ocean waves hitting a beach are always found to be nearly normal to the shore |
| A. | |
| B. | Both statement and reason are true and the reason is the correct explanation of the statement |
| C. | Both statement and reason are true but the reason is not the correct explanation of the statement |
| Answer» B. Both statement and reason are true and the reason is the correct explanation of the statement | |