| 1 |
The apparent change in the pitch of sound due to relative motion is called. |
- A. Carnot theorem
- B. Interference
- C. Doppler effect
- D. Beats
|
| 2 |
The speed of sound in air does not depend upon |
- A. Temperature
- B. Pressure
- C. Density
- D. Medium
|
| 3 |
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
|
| 4 |
If the pressure of a gas is doubled, then speed of sound is. |
- A. Doubled
- B. Become half
- C. Not affected
- D. Increases by four times
|
| 5 |
Speed of sound in copper is |
- A. 38000 ms-1
- B. 3600 ms-1
- C. 3500 ms-1
- D. 3400 ms-1
|
| 6 |
The speed of sound is greater in solids due to their high. |
- A. Density
- B. Pressure
- C. Temperature
- D. Elasticity
|
| 7 |
Who did give the correct formula for the speed of sound in air? |
- A. Boyle
- B. Laplace
- C. Newton
- D. Einstein
|
| 8 |
The waves used in radar speed trap are |
- A. <u>Longitudinal</u>
- B. Sound wave
- C. Micro waves
- D. Matter waves
|
| 9 |
The distance between the consecutive nodes is |
|
| 10 |
When two identical travelling waves are superimposed, velocity of resultant wave. |
- A. Decreases
- B. Increases
- C. Remain same
- D. Becomes zero
|