| 1 |
In stationary waves the points which always remain at rest are. |
- A. Nodes
- B. Antinodes
- C. Crest
- D. Trough
|
| 2 |
Two waves of same frequency and moving in the same direction produces. |
- A. Interference
- B. Diffraction
- C. Beats
- D. Stationary waves
|
| 3 |
The Newton's formula for the speed of sound in air is |
|
| 4 |
When two waves of same frequency travel in opposite direction, the phenomenon will be |
- A. Diffraction
- B. Stationary waves
- C. Polarization
- D. Interference
|
| 5 |
the velocity of sound is maximum at 20 <sup>o</sup>C in |
- A. Lead
- B. Copper
- C. Glass
- D. Iron
|
| 6 |
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
|
| 7 |
When the amplitude of a wave is increase to doubled is energy. |
- A. Remain the same
- B. Increases 4 times
- C. Increases by two times
- D. Decreases by half
|
| 8 |
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
|
| 9 |
If 20 waves passes through he medium in 2 sec of 10 ms-1 then he wavelength is. |
- A. 200 m
- B. 2 m
- C. 1 m
- D. 0.5 m
|
| 10 |
Wavelength of a wave for closed pipe having length 'l' in the fundamental mode is. |
- A. 2 l
- B. 1/2
- C. 4 l
- D. l
|
