| 1 |
Diffraction is a special type of |
- A. Reflection
- B. Polarization
- C. Interference
- D. Refraction
|
| 2 |
The speed of sound in air would become double than ots speed at 10<sup> o</sup>C at a temperature of. |
- A. 313 <sup>o</sup>C
- B. 586 <sup>o</sup>C
- C. 859<sup> o</sup>C
- D. 899 <sup>o</sup>C
|
| 3 |
A stretched string 2 m long and it has 2 hopes of stationary waves hen the wavelength is |
- A. 4 m
- B. 2 m
- C. 3 m
- D. 1 m
|
| 4 |
Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is. |
|
| 5 |
Beats can be heard when difference of frequency is not more than. |
- A. 8 Hz
- B. 10 Hz
- C. 4 Hz
- D. 6 Hz
|
| 6 |
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
|
| 7 |
Which of the following is mechanical wave |
- A. Heat
- B. Light
- C. Sound
- D. None of these
|
| 8 |
the velocity of sound at 0 <sup>o</sup>C is 332 ms-1, the velocity of sound at 10 <sup>o</sup>C will be |
- A. 337.1 ms-1
- B. 338.1 ,ms-1
- C. 342.1 ms-1
- D. 328.1 ms-1
|
| 9 |
Sound waves are |
- A. Electromagnetic waves
- B. Transverse waves
- C. Compressional waves
- D. Matter waves
|
| 10 |
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
|
