| 1 |
When sound waves enter in different medium, the quantity that remains unchanged is. |
- A. Intensity
- B. Speed
- C. Frequency
- D. Wave length
|
| 2 |
When two identical waves superimposed, which can change. |
- A. Wave length
- B. Frequency
- C. Velocity
- D. Amplitude
|
| 3 |
Sound waves are |
- A. Electromagnetic waves
- B. Transverse waves
- C. Compressional waves
- D. Matter waves
|
| 4 |
Increase in speed of sound for 1 <sup>o</sup>C rise in temperature is. |
- A. 0.61 ms-1
- B. 0.61 cms-1
- C. 61 ms-1
- D. 6.1 ms-1
|
| 5 |
The speed of stars and galaxies can be calculated by |
- A. Compton effect
- B. Stefan's law
- C. Doppler's effect
- D. Pascal's law
|
| 6 |
In transverse waves the particles of medium vibrate |
- A. Along the direction of wave
- B. Opposite to direction of wave
- C. Perpendicular to direction of wave
- D. Slowly
|
| 7 |
If 30 waves per second pass through a medium at a speed 30 ms-1, then the wavelength is. |
- A. 30 m
- B. 15 m
- C. 1 m
- D. 28 m
|
| 8 |
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|
| 9 |
A bat finding its correct location by sending |
- A. Matter waves
- B. Ultrasonic waves
- C. Infrasonic waves
- D. electromagnetic waves
|
| 10 |
The Newton's formula for the speed of sound in air is |
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