1 |
The S.I unit of intensity of sound is: |
- A. Wm
- B. Wm2
- C. Wm-2
- D. Wm-1
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2 |
<p class="MsoNormal">Coaxial cable are used to transmit signals:<o:p></o:p></p> |
- A. <p class="MsoNormal">Magnet<o:p></o:p></p>
- B. <p class="MsoNormal">Electric<o:p></o:p></p>
- C. <p class="MsoNormal">Mechanical<o:p></o:p></p>
- D. <p class="MsoNormal">Both mechanical and magnet<o:p></o:p></p>
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3 |
<p class="MsoNormal">The energy is transferred from one place of another:<o:p></o:p></p> |
- A. <p class="MsoNormal">through matter<o:p></o:p></p>
- B. <p class="MsoNormal">through waves<o:p></o:p></p>
- C. <p class="MsoNormal">both a and b<o:p></o:p></p>
- D. <p class="MsoNormal">through vacuum<o:p></o:p></p>
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4 |
Bets can hear sound of frequency up to: |
- A. 100,000 Hz
- B. 25000 Hz
- C. 120,000 Hz
- D. 1000 Hz
|
5 |
<p class="MsoNormal">Ripple tank is an instrument which is used to study the
characteristics of:<o:p></o:p></p> |
- A. <p class="MsoNormal">Mechanical waves<o:p></o:p></p>
- B. <p class="MsoNormal">Light waves<o:p></o:p></p>
- C. <p class="MsoNormal">Radio waves<o:p></o:p></p>
- D. <p class="MsoNormal">Electro-magnet waves<o:p></o:p></p>
|
6 |
Which form of energy is sound? |
- A. Electrical
- B. Mechanical
- C. Thermal
- D. Chemical
|
7 |
If the intensity of faintest audible sound is Io and of another sound is I then sound level will be: |
- A. K log Io/I
- B. Log Io/I 2K
- C. K log Io/I2
- D. K log I/Io
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8 |
<p class="MsoNormal">the waves have properties:<o:p></o:p></p> |
- A. <p class="MsoNormal">reflection<o:p></o:p></p>
- B. <p class="MsoNormal">refraction<o:p></o:p></p>
- C. <p class="MsoNormal">diffraction<o:p></o:p></p>
- D. <p class="MsoNormal">all of these<o:p></o:p></p>
|
9 |
The speed of sound in iron at 25 <sup>o</sup>C is ms<sup>-1</sup> |
- A. 5950
- B. 5900
- C. 6950
- D. 6940
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10 |
The speed of sound was accurately measured in: |
- A. 1736
- B. 1737
- C. 1738
- D. 1739
|