MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When a stone is dropped on the surface of still water, the waves produced are |
| A. | Transverse |
| B. | Longitudinal |
| C. | Stationary |
| D. | Partially longitudinal and partially transverse |
| Answer» E. | |
| 2. |
A noise level of 100 decibel would correspond to |
| A. | Just audible sound |
| B. | Ordinary conversation |
| C. | Sound from a noisy street |
| D. | Noise from a machine shop |
| Answer» E. | |
| 3. |
There is no net transfer of energy by the particles of the medium in |
| A. | Longitudinal waves |
| B. | Transverse waves |
| C. | Progressive waves |
| D. | Stationary waves |
| Answer» E. | |
| 4. |
In a stationary wave along a string the strain is |
| A. | Zero at nodes |
| B. | Maximum of nodes |
| C. | Maximum at anti nodes |
| D. | Constant every where |
| Answer» E. | |
| 5. |
In a stationary longitudinal wave, nodes are points of |
| A. | Maximum pressure |
| B. | Minimum pressure |
| C. | Minimum pressure variation |
| D. | Maximum pressure variation |
| Answer» E. | |
| 6. |
Radar waves are sent towards a moving aeroplane and the reflected waves are received. When the aeroplane is moving towards the radar, the wavelength of then wave |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | Sometimes increases of decreases |
| Answer» C. Remains the same | |
| 7. |
If two waves of amplitude a produce a resultant wave of amplitude a, the n the phase difference between them is |
| A. | 60 |
| B. | 90 |
| C. | 120 |
| D. | 180 |
| Answer» D. 180 | |
| 8. |
A particle is executing simple harmonic motion. Its total energy is proportional to its |
| A. | Displacement from equilibrium position |
| B. | Frequency of oscillation |
| C. | Square of amplitude of motion |
| D. | Velocity at equilibrium position |
| Answer» D. Velocity at equilibrium position | |
| 9. |
The velocity of sound produced by a vibrating body varies |
| A. | Directly as the sq. root of density of the medium |
| B. | Inversely as the density of the medium |
| C. | Directly as the sq. root of frequency of the medium |
| D. | Inversely as the frequency of the medium |
| Answer» C. Directly as the sq. root of frequency of the medium | |
| 10. |
If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity will |
| A. | Increase by a factor of 2 |
| B. | Decreases by a factor of2 |
| C. | Decrease by a factor of 4 |
| D. | Remain unchanged |
| Answer» D. Remain unchanged | |
| 11. |
With the propagation of a longitudinal wave through a material medium, the quantities transferred in the direction of propagation are |
| A. | Energy, momentum and mass |
| B. | Energy and momentum |
| C. | Energy and mass |
| D. | Energy |
| Answer» C. Energy and mass | |
| 12. |
The temperature at which the speed of sound in air becomes double of its value at 27 C is |
| A. | 54 C |
| B. | 327 C |
| C. | 927 C |
| D. | -123 C |
| Answer» D. -123 C | |
| 13. |
If the pressure amplitude of a sound wave is tripled, then the intensity of the wave increased by a factor |
| A. | 3 |
| B. | 6 |
| C. | 9 |
| D. | |
| E. | <span style="text-decoration:overline">3</span> |
| Answer» D. | |