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Physics 10th Class English Medium Unit 2 Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | The disturbance travelling in a medium is called: |
<p class="MsoNormal">Wave motion<o:p></o:p></p> <p class="MsoNormal">Simple harmonic motion<o:p></o:p></p> Motion both a and b |
| 2 | Old people can not hear sound above then _____ Hz | 1000 15000 20000 10000 |
| 3 | To hear echoes, the minimum distance of the obstacle from source of sound should be: | 10 m 15 m 17 m 20 m |
| 4 | The sound level of rustling of leave is: | 1 dB 20 dB 30 dB 10 dB |
| 5 | The frequency of silent whistle is: | 20,000 Hz - 25000 Hz 2000 Hz - 25000 Hz 200 Hz - 2000 Hz 25000 Hz |
| 6 | The speed of sound in iron at 25 oC is ms-1 | 5950 5900 6950 6940 |
| 7 | The speed of sound of water at 25 oC is: | 1530 ms<sup>-1</sup> 1531 ms<sup>-1</sup> 1560 ms<sup>-1</sup> 1570 ms<sup>-1</sup> |
| 8 | The speed of sound in air at 0 oC is: | 331 ms<sup>-1</sup> 332 ms<sup>-1</sup> 333 ms<sup>-1</sup> 336 ms<sup>-1</sup> |
| 9 | The intensity of lawn mover is: | 10<sup>-1</sup> wm<sup>-2</sup> 10<sup>-2</sup>wm<sup>-2</sup> 10<sup>-1</sup>wm<sup>-3</sup> 10<sup>-3</sup>wm<sup>-2</sup> |
| 10 | The unit of intensity of sound: | wm<sup>-1</sup> wm wm<sup>-2</sup> wm<sup>-3</sup> |
| 11 | Bets can hear sound of frequency up to: | 100,000 Hz 25000 Hz 120,000 Hz 1000 Hz |
| 12 | The speed of sound is air at 21 oC is: | 336 ms<sup>-1</sup> 343 ms<sup>-1</sup> 430 ms<sup>-1</sup> 470 ms<sup>-1</sup> |
