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Physics 10th Class English Medium Unit 4 Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | Old people cannot hear sound above than: |
<p class="MsoNormal">1000 Hz<o:p></o:p></p> <p class="MsoNormal">15000 Hz<o:p></o:p></p> <p class="MsoNormal">20000 Hz<o:p></o:p></p> |
| 2 | To hear echoes, the minimum distance of the obstacle from source of sound should be: | 10m 15m 17m 20m |
| 3 | The sound level of rustling of leave is: |
<p class="MsoNormal">1 dB<o:p></o:p></p> <p class="MsoNormal">20 dB<o:p></o:p></p> <p class="MsoNormal">30 dB<o:p></o:p></p> <p class="MsoNormal">10 dB<o:p></o:p></p> |
| 4 | The frequency of silent whistle is: |
<p class="MsoNormal">20,000 Hz – 25000Hz<o:p></o:p></p> <p class="MsoNormal">2000 Hz – 2500Hz<o:p></o:p></p> <p class="MsoNormal">200 KHz – 2000 Hz<o:p></o:p></p> <p class="MsoNormal">25000 KHz<o:p></o:p></p> |
| 5 | The speed of sound in iron at 25°C is: |
<p class="MsoNormal">5950 m/sec<o:p></o:p></p> <p class="MsoNormal">5900 m/sec<o:p></o:p></p> <p class="MsoNormal">6950 m/sec<o:p></o:p></p> <p class="MsoNormal">6940 m/sec<o:p></o:p></p> |
| 6 | The speed of sound in are water at 25°C is: | 1530ms-1 1531ms-1 1560ms-1 1570ms-1 |
| 7 | The speed of sound in air at 0°C is: |
<p class="MsoNormal">331ms<sup>-1</sup><o:p></o:p></p> <p class="MsoNormal">376ms<sup>-1</sup><o:p></o:p></p> <p class="MsoNormal">231ms<sup>-1</sup><o:p></o:p></p> <p class="MsoNormal">386ms<sup>-1</sup><o:p></o:p></p> |
| 8 | Frequency of tuning fork depends upon its …………. of prongs: |
<span style="font-size:11.0pt;line-height:107%; font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial;mso-bidi-theme-font:minor-bidi;mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Weight</span> <span style="font-size:11.0pt;line-height:107%; font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial;mso-bidi-theme-font:minor-bidi;mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Speed</span> <span style="font-size:11.0pt;line-height:107%; font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial;mso-bidi-theme-font:minor-bidi;mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Mass</span> <span style="font-size:11.0pt;line-height:107%; font-family:"Calibri",sans-serif;mso-ascii-theme-font:minor-latin;mso-fareast-font-family: Calibri;mso-fareast-theme-font:minor-latin;mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial;mso-bidi-theme-font:minor-bidi;mso-ansi-language: EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Distance</span> |
| 9 | The intensity of lawn mover is: |
<p class="MsoNormal">10-1 wm<sup>-2</sup><o:p></o:p></p> <p class="MsoNormal">10-2 wm<sup>-2</sup><o:p></o:p></p> <p class="MsoNormal">10-3 wm<sup>-2</sup><o:p></o:p></p> <p class="MsoNormal">10-4 wm<sup>-2</sup><o:p></o:p></p> |
| 10 | The unit of intensity of sound: |
<p class="MsoNormal">Wm<sup>-1</sup><o:p></o:p></p> <p class="MsoNormal">Wm<sup>-2</sup><o:p></o:p></p> <p class="MsoNormal">Wm<o:p></o:p></p> <p class="MsoNormal">Wm<sup>2</sup><o:p></o:p></p> |
| 11 | Bats can hear sound of frequency up to: |
<p class="MsoNormal">100,000Hz<o:p></o:p></p> <p class="MsoNormal">25000Hz<o:p></o:p></p> <p class="MsoNormal">120, 000Hz<o:p></o:p></p> <p class="MsoNormal">1000Hz<o:p></o:p></p> |
| 12 | The speed of sound in air at 21 °C is: |
<p class="MsoNormal">336ms<sup>-1</sup><o:p></o:p></p> <p class="MsoNormal">343ms<sup>-1</sup><o:p></o:p></p> <p class="MsoNormal">430ms<sup>-1</sup><o:p></o:p></p> <p class="MsoNormal">470ms<sup>-1<o:p></o:p></sup></p> |
