| 1 |
When the amplitude of a wave become double, its energy becomes |
- A. One half
- B. Two times
- C. Three times
- D. Four times
|
| 2 |
The wavelength of fundamental note in one end closed pipe in term of length 'l' of pipe is. |
- A. 4 l
- B. 2l
- C. l
- D. 1/4 l
|
| 3 |
Sound wave can not be |
- A. Reflected
- B. Refracted
- C. Diffracted
- D. Polarized
|
| 4 |
Stationary waves are generated on a string of high l, if tension is increased , frequency of vibration will |
- A. Decrease
- B. Unchanged
- C. Half
- D. Increases
|
| 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 |
Speed of sound in copper is |
- A. 38000 ms-1
- B. 3600 ms-1
- C. 3500 ms-1
- D. 3400 ms-1
|
| 7 |
On loading the prong of a tuning fork with wax, the frequency of sound. |
- A. Increases
- B. Decreases
- C. Remains same
- D. First increases then decrease
|
| 8 |
Speed of sound in aluminum at 20 <sup>o</sup>C is. |
- A. 3600 m/s
- B. 5100 m/s
- C. 5130 m/s
- D. 3500 m/s
|
| 9 |
The Newton's formula for the speed of sound in air is |
|
| 10 |
If a stretched string 4 m long and it has 4 loops of stationary waves, then the wave length is. |
- A. 1m
- B. 2 m
- C. 3 m
- D. 4 m
|