| 1 |
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
|
| 2 |
The profile of periodic waves generated by a source executing S.H.M is represented by a. |
- A. Circle
- B. Sine curve
- C. Tangent curve
- D. Cosine curve
|
| 3 |
The speed \velocity of sound is greatest in. |
- A. Air
- B. Steel
- C. Ammonia
- D. Water
|
| 4 |
Teh speed of sound in air is 340 m/s. If the pressure of air is doubled then the speed becomes. |
- A. Double
- B. Half
- C. Four times
- D. Remains same
|
| 5 |
According to Newton, sound travels in air under conditions of. |
- A. Adiabatic
- B. Isothermal
- C. Isobaric
- D. Isochoric
|
| 6 |
Which of the following is mechanical wave |
- A. Heat
- B. Light
- C. Sound
- D. None of these
|
| 7 |
In vibrating string, the points where the amplitude is maximum are called. |
- A. Nodes
- B. Antinodes
- C. Troughs
- D. Crests
|
| 8 |
The experimental value for the velocity of sound in air is |
- A. 233 m-sec<sup>-1</sup>
- B. 333 m-sec<sup>-1</sup>
- C. 433 m-sec<sup>-1</sup>
- D. 533 m-sec<sup>-1</sup>
|
| 9 |
Speed of sound in vacuum is |
- A. 280 ms-1
- B. 332 ms-1
- C. 333 ms-1
- D. Zero ms-1
|
| 10 |
the louder the sound, the greater will be its. |
- A. Speed
- B. Frequency
- C. Amplitude
- D. Wave length
|
