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Physics 10th Class English Medium Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | 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> |
| 2 | 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> |
| 3 | 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> |
| 4 | The speed of sound was accurately measured in: | 1736 1737 1738 1739 |
| 5 | When frequency of sound wave is increased, which of the following decreases:WavelengthPeriodAmplitude | (i) Only (iii) Only (i) And (ii) only (i) And (iii) only |
| 6 | For a normal person audible frequency range for sound wave
lies between: |
<p class="MsoNormal">10 Hz and 10kHz<o:p></o:p></p> <p class="MsoNormal">20Hz and 20 kHz<o:p></o:p></p> <p class="MsoNormal">25 Hz and 25 kHz<o:p></o:p></p> <p class="MsoNormal">30Hz and 30 kHz<o:p></o:p></p> |
| 7 | The loudness of a sound is most closely related to its: |
<p class="MsoNormal">Frequency<o:p></o:p></p> <p class="MsoNormal">Period<o:p></o:p></p> <p class="MsoNormal">Wavelength<o:p></o:p></p> <p class="MsoNormal">Amplitude<o:p></o:p></p> |
| 8 | Astronauts in space need to communicate with each other by
radio links because: |
<p class="MsoNormal">Sound waves travel very slowly in space<o:p></o:p></p> <p class="MsoNormal">Sound waves travel very fast in space<o:p></o:p></p> <p class="MsoNormal">Sound waves cannot travel in space<o:p></o:p></p> <p class="MsoNormal">Sound waves have low frequency in space<o:p></o:p></p> |
| 9 | Which form of energy is sound: |
<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">Electrical</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">mechanical</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">Thermal</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">Chemical</span> |
| 10 | How does sound travel from its source to your ear: |
<p class="MsoNormal">By changes in air pressure<o:p></o:p></p> <p class="MsoNormal">By vibration in wires or strings<o:p></o:p></p> <p class="MsoNormal">By electromagnetic waves<o:p></o:p></p> <p class="MsoNormal">By infrared waves<o:p></o:p></p> |
| 11 | Which is an example of a longitudinal wave: |
<p class="MsoNormal">Sound wave<o:p></o:p></p> <p class="MsoNormal">Light wave<o:p></o:p></p> <p class="MsoNormal">Radio wave<o:p></o:p></p> <p class="MsoNormal">Water wave<o:p></o:p></p> |
| 12 | The distance between two consecutive waves compressions or
rarefactions is called: |
<p class="MsoNormal">Focal length<o:p></o:p></p> <p class="MsoNormal">Wave length<o:p></o:p></p> <p class="MsoNormal">Frequency<o:p></o:p></p> <p class="MsoNormal">Time period<o:p></o:p></p> |
