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Physics 10th Class English Medium Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | The frequency of silent whistle is: | 20,000 Hz - 25000 Hz 2000 Hz - 25000 Hz 200 Hz - 2000 Hz 25000 Hz |
| 2 | The speed of sound in iron at 25 oC is ms-1 | 5950 5900 6950 6940 |
| 3 | 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> |
| 4 | 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> |
| 5 | 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> |
| 6 | The unit of intensity of sound: | wm<sup>-1</sup> wm wm<sup>-2</sup> wm<sup>-3</sup> |
| 7 | Bets can hear sound of frequency up to: | 100,000 Hz 25000 Hz 120,000 Hz 1000 Hz |
| 8 | 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> |
| 9 | The speed of sound was accurately measured in: | 1736 1737 1738 1739 |
| 10 | When frequency of sound wave is increased, which of the following decreases? i) Wavelength ii) Period iii) Amplitude |
i only (iii) only i and ii only i and iii only |
| 11 | For normal person audible frequency range for sound wave lies between. | 10 Hz and 10KHz 20 Hz and 20KHz 25 Hz and 25KHz 30 Hz and 30KHz |
| 12 | The loudness of sound is most closely related to its: | Freqeucy Period Wavelength Amplitude |
